ci: bump actions/labeler from 6 to 7 (#21159)

Bumps [actions/labeler](https://github.com/actions/labeler) from 6 to 7.
- [Release notes](https://github.com/actions/labeler/releases)
- [Commits](actions/labeler@v6...v7)

---
updated-dependencies:
- dependency-name: actions/labeler
  dependency-version: '7'
  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>

Author: dependabot[bot]

.github/workflows/pr-labeler.yml

@@ -7,6 +7,6 @@ jobs:
             pull-requests: write
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/labeler@v6
+            - uses: actions/labeler@v7
               with:
                   sync-labels: true