ci: bump actions/labeler from 5 to 6 (#35641)

Bumps [actions/labeler](https://github.com/actions/labeler) from 5 to 6.
- [Release notes](https://github.com/actions/labeler/releases)
- [Commits](https://github.com/actions/labeler/compare/v5...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/labeler_pr.yml

@@ -10,7 +10,7 @@ jobs:
       pull-requests: write
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/labeler@v5
+    - uses: actions/labeler@v6
       with:
         configuration-path: .github/scripts/labeler_configuration.yml