renovate: fix gitea actions schedule

Also pin patch version of Gitea actions. This should treat each future
update as an update rather than a relock which should show the changelog
in the PR.

.gitea/workflows/flake.yaml

@@ -11,7 +11,7 @@ jobs:
   flake:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4
+      - uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
       - name: Prepare for Nix installation
         run: |
           apt-get update

renovate.json

@@ -11,7 +11,10 @@
     {
       "matchManagers": ["github-actions"],
       "automerge": true,
-      "schedule": ["after 11pm on Monday and Thursday"]
+      "schedule": [
+        "after 11pm on Monday",
+        "after 11pm on Thursday"
+      ]
     }
   ],
   "extends": [