Update Helm release postgres-cluster to v6

renovate.json

@@ -19,10 +19,7 @@
             "addLabels": [
                 "chart"
             ],
-            "automerge": false,
+            "automerge": false
-            "internalChecksAsSuccess": true,
-            "internalChecksFilter": "flexible",
-            "minimumReleaseAge": "1 days"
         },
         {
             "description": "Automerge chart patches",
@@ -48,10 +45,7 @@
             "addLabels": [
                 "image"
             ],
-            "automerge": false,
+            "automerge": false
-            "internalChecksAsSuccess": true,
-            "internalChecksFilter": "flexible",
-            "minimumReleaseAge": "1 days"
         },
         {
             "description": "Automerge image patches",