nixos/doc: mention signald update in release-notes and related upgrade instructions

nixos/doc/manual/from_md/release-notes/rl-2211.section.xml

@@ -944,6 +944,22 @@
           <literal>mariadb</literal> if possible.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <literal>signald</literal> has been bumped to
+          <literal>0.23.0</literal>. For the upgrade, a migration
+          process is necessary. It can be done by running a command like
+          this before starting <literal>signald.service</literal>:
+        </para>
+        <programlisting>
+signald -d /var/lib/signald/db \
+  --database sqlite:/var/lib/signald/db \
+  --migrate-data
+</programlisting>
+        <para>
+          For further information, please read the upstream changelogs.
+        </para>
+      </listitem>
       <listitem>
         <para>
           <literal>stylua</literal> no longer accepts

nixos/doc/manual/release-notes/rl-2211.section.md

@@ -286,6 +286,17 @@ Available as [services.patroni](options.html#opt-services.patroni.enable).
 
 - `percona-server56` has been removed. Please migrate to `mysql` or `mariadb` if possible.
 
+- `signald` has been bumped to `0.23.0`. For the upgrade, a migration process is necessary. It can be
+  done by running a command like this before starting `signald.service`:
+
+  ```
+  signald -d /var/lib/signald/db \
+    --database sqlite:/var/lib/signald/db \
+    --migrate-data
+  ```
+
+  For further information, please read the upstream changelogs.
+
 - `stylua` no longer accepts `lua52Support` and `luauSupport` overrides, use `features` instead, which defaults to `[ "lua54" "luau" ]`.
 
 - `pkgs.fetchNextcloudApp` has been rewritten to circumvent impurities in e.g. tarballs from GitHub and to make it easier to