change default cluster name to start with release

charts/postgres-cluster/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v2
 name: postgres-cluster
-version: 2.2.2
+version: 2.3.0
 description: Chart for cloudnative-pg cluster
 keywords:
   - database

charts/postgres-cluster/templates/_helpers.tpl

@@ -5,7 +5,7 @@ Expand the name of the chart.
   {{- if .Values.nameOverride }}
     {{- .Values.nameOverride | trunc 63 | trimSuffix "-" }}
   {{- else }}
-    {{- printf "postgresql-%s-%s" ((semver .Values.cluster.image.tag).Major | toString) .Release.Name | trunc 63 | trimSuffix "-" -}}
+    {{- printf "%s-postgresql-%s" .Release.Name ((semver .Values.cluster.image.tag).Major | toString) | trunc 63 | trimSuffix "-" -}}
   {{- end }}
 {{- end }}