Update Helm release postgres-cluster to v6

.gitea/workflows/lint-test.yaml

@@ -28,15 +28,6 @@ jobs:
           token: ${{ secrets.GITEA_TOKEN }}
           version: latest
 
-      - name: Lint Helm Chart
-        run: |
-          find clusters -maxdepth 4 -name Chart.yaml -exec dirname {} \; | while read -r chart_path; do
-            echo "Building chart dependency in $chart_path"
-            helm dependency build "$chart_path"
-            echo "Linting chart in $chart_path"
-            helm lint "$chart_path"
-          done
-
       - name: Lint Helm Chart
         run: |
           set -e  # Exit immediately if a command exits with a non-zero status.