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] <[email protected]>

Author: dependabot[bot]

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

@@ -14,6 +14,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Assign labels to pull request
-        uses: actions/labeler@v5
+        uses: actions/labeler@v6
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"