feat(container): update image ghcr.io/cloudnative-pg/postgresql to v16.6-2 (#3065)

Co-authored-by: layla-bot[bot] <138733633+layla-bot[bot]@users.noreply.github.com>

Author: layla-bot[bot]

kubernetes/fenrys/apps/database/cloudnative-pg/cluster/cluster.yaml

@@ -7,7 +7,7 @@ metadata:
   namespace: database
 spec:
   instances: 1
-  imageName: ghcr.io/cloudnative-pg/postgresql:16.5-5
+  imageName: ghcr.io/cloudnative-pg/postgresql:16.6-2
   primaryUpdateStrategy: unsupervised
   storage:
     size: 20Gi