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

.gitea/workflows/lint-test.yaml

@@ -20,12 +20,11 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v6
         with:
-          python-version: '3.14'
+          python-version: '3.x'
+          check-latest: true
 
       - name: Set up Chart Testing
-        uses: helm/chart-testing-action@v2.7.0
+        uses: helm/chart-testing-action@v2.8.0
-        with:
-          yamale_version: "6.0.0"
 
       - name: Run Chart Testing (list-changed)
         id: list-changed

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