Update ghcr.io/cloudnative-pg/postgresql Docker tag to v18

.gitea/workflows/lint-test.yaml

@@ -92,7 +92,13 @@ jobs:
         id: branch-exists
         if: github.event_name == 'push' || steps.check-branch-exists.outputs.exists == 'true' && github.event_name == 'pull_request'
         run: |
-          echo ">> Branch ${{ gitea.base_ref }} exists, will continue with linting"
+          if [ ${{ github.event_name == 'push' }} ]; then
+            echo ">> Action is from a push event, will continue with linting"
+
+          else
+            echo ">> Branch ${{ gitea.base_ref }} exists, will continue with linting"
+
+          fi
 
           echo "----"
 
@@ -100,6 +106,7 @@ jobs:
 
       - name: Set up Helm
         uses: azure/setup-helm@v4
+        if: steps.branch-exists.outputs.exists == 'true'
         with:
           token: ${{ secrets.GITEA_TOKEN }}
           version: v3
@@ -129,7 +136,7 @@ jobs:
 
             for path in $GIT_DIFF; do
               CHANGED_CHARTS+=$(echo "$path" | awk -F '/' '{print $2}')
-              RENDER_DIR+=$(echo " ")
+              CHANGED_CHARTS+=$(echo " ")
             done
 
           else

charts/postgres-cluster/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: postgres-cluster
-version: 6.16.1
+version: 6.17.0
 description: Cloudnative-pg Cluster
 keywords:
   - database

charts/postgres-cluster/values.yaml

@@ -20,7 +20,7 @@ cluster:
   # -- Default image
   image:
     repository: ghcr.io/cloudnative-pg/postgresql
-    tag: 17.7-standard-trixie
+    tag: 18.1-standard-trixie
 
   # -- Image pull policy. One of Always, Never or IfNotPresent. If not defined, it defaults to IfNotPresent. Cannot be updated.
   # More info: https://kubernetes.io/docs/concepts/containers/images#updating-images