Bump peter-evans/enable-pull-request-automerge from 2 to 3

Bumps [peter-evans/enable-pull-request-automerge](https://github.com/peter-evans/enable-pull-request-automerge) from 2 to 3.
- [Release notes](https://github.com/peter-evans/enable-pull-request-automerge/releases)
- [Commits](peter-evans/enable-pull-request-automerge@v2...v3)

---
updated-dependencies:
- dependency-name: peter-evans/enable-pull-request-automerge
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/check-manual-dependencies.yml

@@ -57,6 +57,6 @@ jobs:
             If there are notable changes in the dependencies' changelogs, then please create a new release.
 
       - name: Automatically merge when tests pass
-        uses: peter-evans/enable-pull-request-automerge@v2
+        uses: peter-evans/enable-pull-request-automerge@v3
         with:
           pull-request-number: ${{ steps.pull-request.outputs.pull-request-number }}