Bump actions/labeler from 4 to 6

Bumps [actions/labeler](https://github.com/actions/labeler) from 4 to 6.
- [Release notes](https://github.com/actions/labeler/releases)
- [Commits](actions/labeler@v4...v6)

---
updated-dependencies:
- dependency-name: actions/labeler
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/labeler.yml

@@ -7,7 +7,7 @@ jobs:
   label:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/labeler@v4
+    - uses: actions/labeler@v6
       if: github.base_ref == null
       with:
         repo-token: "${{ secrets.GITHUB_TOKEN }}"