Bump actions/labeler from 4 to 5

Bumps [actions/labeler](https://github.com/actions/labeler) from 4 to 5.
- [Release notes](https://github.com/actions/labeler/releases)
- [Commits](actions/labeler@v4...v5)

---
updated-dependencies:
- dependency-name: actions/labeler
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/pr-target.yml

@@ -12,7 +12,7 @@ jobs:
     if: ${{ github.event.pull_request.user.login != 'dependabot[bot]' }}
     steps:
       - id: label-the-PR
-        uses: actions/labeler@v4
+        uses: actions/labeler@v5
 
   # automerge successful dependabot PRs
   dependabot: