build(deps): bump actions/labeler from 3.1.0 to 4

Bumps [actions/labeler](https://github.com/actions/labeler) from 3.1.0 to 4.
- [Release notes](https://github.com/actions/labeler/releases)
- [Commits](actions/labeler@v3.1.0...v4)

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

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

Author: dependabot[bot]

.github/workflows/pull-request.yml

@@ -20,6 +20,6 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: Apply labels
-        uses: actions/labeler@v3.1.0
+        uses: actions/labeler@v4
         with:
           repo-token: ${{github.token}}