chore(deps): update actions/labeler action to v6

Author: renovate[bot]

.github/workflows/labeler_workflow.yml

@@ -30,5 +30,5 @@ jobs:
       run: tox
 
     - name: Add label if tests fail
-      uses: actions/labeler@v5
+      uses: actions/labeler@v6
       if: ${{ failure() }}