Update GitHub Action workflows to actions/labeler@v6

Author: TimWolla

.github/workflows/labeler.yml

@@ -12,6 +12,6 @@ jobs:
       pull-requests: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/labeler@v5
+      - uses: actions/labeler@v6
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"