build(deps): 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/manage-pr.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Generate label config
         run: cd master && SCAN_DIR=../merge ./contrib/gen_label_config.sh
       - name: Update labels
-        uses: actions/labeler@v5
+        uses: actions/labeler@v6
         with:
           configuration-path: master/.github/labeler.yml
           sync-labels: true