Update docker.io/postgres Docker tag to v18

clusters/cl01tl/storage/backrest/templates/service.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: garage-ps10rp
+  namespace: {{ .Release.Namespace }}
+  labels:
+    app.kubernetes.io/name: garage-ps10rp
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/part-of: {{ .Release.Name }}
+  annotations:
+    tailscale.com/tailnet-fqdn: garage-ps10rp.boreal-beaufort.ts.net
+spec:
+  externalName: placeholder
+  type: ExternalName