Bump actions/labeler from 3 to 4 (#13)

Bumps [actions/labeler](https://github.com/actions/labeler) from 3 to 4.
- [Release notes](https://github.com/actions/labeler/releases)
- [Commits](actions/labeler@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/labeler.yml

@@ -14,6 +14,6 @@ jobs:
  label:
  runs-on: ubuntu-latest
  steps:
- - uses: actions/labeler@v3
+ - uses: actions/labeler@v4
  with:
  repo-token: "${{ secrets.GITHUB_TOKEN }}"