Bump actions/labeler from 5 to 6

Bumps [actions/labeler](https://github.com/actions/labeler) from 5 to 6.
- [Release notes](https://github.com/actions/labeler/releases)
- [Commits](actions/labeler@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>

Author: dependabot[bot]

.github/workflows/new-pull-requests.yml

@@ -21,7 +21,7 @@ jobs:
     steps:
       # Use label configuration from main instead of from the pull request branch
       # to mitigate running untrusted workflows with write permissions.
-      - uses: actions/labeler@v5
+      - uses: actions/labeler@v6
         with:
           configuration-path: '.github/new-pull-request-labels.yml'
           sync-labels: true