ci: pin third party actions

For reproducibility.

Command:

```shell
for file in .github/workflows/*.y*ml; do
    npx pin-github-action --comment=' {ref}' "$file"
done
```

Then had to manually replace all the versions with accurate specifiers
(for example, "v4" → "v4.1.1" in case of `actions/checkout`).

.github/workflows/backport.yml

@@ -20,11 +20,11 @@ jobs:
     if: github.repository_owner == 'NixOS' && github.event.pull_request.merged == true && (github.event_name != 'labeled' || startsWith('backport', github.event.label.name))
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Create backport PRs
-        uses: korthout/backport-action@v2.1.1
+        uses: korthout/backport-action@08bafb375e6e9a9a2b53a744b987e5d81a133191 # v2.1.1
         with:
           # Config README: https://github.com/korthout/backport-action#backport-action
           copy_labels_pattern: 'severity:\ssecurity'

.github/workflows/basic-eval.yml

@@ -18,9 +18,9 @@ jobs:
     runs-on: ubuntu-latest
     # we don't limit this action to only NixOS repo since the checks are cheap and useful developer feedback
     steps:
-    - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v23
-    - uses: cachix/cachix-action@v12
+    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+    - uses: cachix/install-nix-action@6a9a9e84a173d90b3ffb42c5ddaf9ea033fad011 # v24
+    - uses: cachix/cachix-action@6a9a34cdd93d0ae4b4b59fd678660efb08109f2f # v13
       with:
         # This cache is for the nixpkgs repo checks and should not be trusted or used elsewhere.
         name: nixpkgs-ci

.github/workflows/check-by-name.yml

@@ -49,7 +49,7 @@ jobs:
             exit 1
           fi
           echo "mergedSha=$mergedSha" >> "$GITHUB_ENV"
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           # pull_request_target checks out the base branch by default
           ref: ${{ env.mergedSha }}
@@ -61,7 +61,7 @@ jobs:
           echo "baseSha=$(git rev-parse HEAD^1)" >> "$GITHUB_ENV"
 
           echo "headSha=$(git rev-parse HEAD^2)" >> "$GITHUB_ENV"
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@6a9a9e84a173d90b3ffb42c5ddaf9ea033fad011 # v24
       - name: Determining channel to use for dependencies
         run: |
           echo "Determining the preferred channel to use for PR base branch $GITHUB_BASE_REF"
@@ -176,4 +176,3 @@ jobs:
           } >> "$GITHUB_STEP_SUMMARY"
 
           exit "$exitCode"
-

.github/workflows/check-maintainers-sorted.yaml

@@ -12,11 +12,11 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository_owner == 'NixOS'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           # pull_request_target checks out the base branch by default
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@6a9a9e84a173d90b3ffb42c5ddaf9ea033fad011 # v24
         with:
           # explicitly enable sandbox
           extra_nix_config: sandbox = true

.github/workflows/editorconfig.yml

@@ -24,11 +24,11 @@ jobs:
     - name: print list of changed files
       run: |
         cat "$HOME/changed_files"
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       with:
         # pull_request_target checks out the base branch by default
         ref: refs/pull/${{ github.event.pull_request.number }}/merge
-    - uses: cachix/install-nix-action@v23
+    - uses: cachix/install-nix-action@6a9a9e84a173d90b3ffb42c5ddaf9ea033fad011 # v24
       with:
         # nixpkgs commit is pinned so that it doesn't break
         # editorconfig-checker 2.4.0

.github/workflows/labels.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     if: "github.repository_owner == 'NixOS' && !contains(github.event.pull_request.title, '[skip treewide]')"
     steps:
-    - uses: actions/labeler@v4
+    - uses: actions/labeler@ac9175f8a1f3625fd0d4fb234536d26811351594 # v4.3.0
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
         sync-labels: true

.github/workflows/manual-nixos.yml

@@ -14,15 +14,15 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository_owner == 'NixOS'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           # pull_request_target checks out the base branch by default
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@6a9a9e84a173d90b3ffb42c5ddaf9ea033fad011 # v24
         with:
           # explicitly enable sandbox
           extra_nix_config: sandbox = true
-      - uses: cachix/cachix-action@v12
+      - uses: cachix/cachix-action@6a9a34cdd93d0ae4b4b59fd678660efb08109f2f # v13
         with:
           # This cache is for the nixpkgs repo checks and should not be trusted or used elsewhere.
           name: nixpkgs-ci

.github/workflows/manual-nixpkgs.yml

@@ -15,15 +15,15 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository_owner == 'NixOS'
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
           # pull_request_target checks out the base branch by default
           ref: refs/pull/${{ github.event.pull_request.number }}/merge
-      - uses: cachix/install-nix-action@v23
+      - uses: cachix/install-nix-action@6a9a9e84a173d90b3ffb42c5ddaf9ea033fad011 # v24
         with:
           # explicitly enable sandbox
           extra_nix_config: sandbox = true
-      - uses: cachix/cachix-action@v12
+      - uses: cachix/cachix-action@6a9a34cdd93d0ae4b4b59fd678660efb08109f2f # v13
         with:
           # This cache is for the nixpkgs repo checks and should not be trusted or used elsewhere.
           name: nixpkgs-ci

.github/workflows/periodic-merge-24h.yml

@@ -44,10 +44,10 @@ jobs:
             into: staging-23.11
     name: ${{ matrix.pairs.from }} → ${{ matrix.pairs.into }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
       - name: ${{ matrix.pairs.from }} → ${{ matrix.pairs.into }}
-        uses: devmasx/merge-branch@1.4.0
+        uses: devmasx/merge-branch@854d3ac71ed1e9deb668e0074781b81fdd6e771f # 1.4.0
         with:
           type: now
           from_branch: ${{ matrix.pairs.from }}
@@ -55,7 +55,7 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Comment on failure
-        uses: peter-evans/create-or-update-comment@v3
+        uses: peter-evans/create-or-update-comment@23ff15729ef2fc348714a3bb66d2f655ca9066f2 # v3.1.0
         if: ${{ failure() }}
         with:
           issue-number: 105153

.github/workflows/periodic-merge-6h.yml

@@ -38,10 +38,10 @@ jobs:
             into: staging
     name: ${{ matrix.pairs.from }} → ${{ matrix.pairs.into }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
       - name: ${{ matrix.pairs.from }} → ${{ matrix.pairs.into }}
-        uses: devmasx/merge-branch@1.4.0
+        uses: devmasx/merge-branch@854d3ac71ed1e9deb668e0074781b81fdd6e771f # 1.4.0
         with:
           type: now
           from_branch: ${{ matrix.pairs.from }}
@@ -49,7 +49,7 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Comment on failure
-        uses: peter-evans/create-or-update-comment@v3
+        uses: peter-evans/create-or-update-comment@23ff15729ef2fc348714a3bb66d2f655ca9066f2 # v3.1.0
         if: ${{ failure() }}
         with:
           issue-number: 105153

.github/workflows/update-terraform-providers.yml

@@ -16,8 +16,8 @@ jobs:
     if: github.repository_owner == 'NixOS' && github.ref == 'refs/heads/master' # ensure workflow_dispatch only runs on master
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: cachix/install-nix-action@v23
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - uses: cachix/install-nix-action@6a9a9e84a173d90b3ffb42c5ddaf9ea033fad011 # v24
         with:
           nix_path: nixpkgs=channel:nixpkgs-unstable
       - name: setup
@@ -46,7 +46,7 @@ jobs:
         run: |
           git clean -f
       - name: create PR
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@153407881ec5c347639a548ade7d8ad1d6740e38 # v5.0.2
         with:
           body: |
             Automatic update by [update-terraform-providers](https://github.com/NixOS/nixpkgs/blob/master/.github/workflows/update-terraform-providers.yml) action.