fix(container): update ghcr.io/cloudnative-pg/postgresql ( 16.6-19 → 16.6-20 )

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This PR contains the following updates:

Package	Update	Change
ghcr.io/cloudnative-pg/postgresql	patch	16.6-19 -> 16.6-20

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--- kubernetes/apps/database/cloudnative-pg/cluster Kustomization: flux-system/cloudnative-pg-cluster Cluster: database/postgres16

+++ kubernetes/apps/database/cloudnative-pg/cluster Kustomization: flux-system/cloudnative-pg-cluster Cluster: database/postgres16

@@ -7,13 +7,13 @@

     kustomize.toolkit.fluxcd.io/name: cloudnative-pg-cluster
     kustomize.toolkit.fluxcd.io/namespace: flux-system
   name: postgres16
   namespace: database
 spec:
   enableSuperuserAccess: true
-  imageName: ghcr.io/cloudnative-pg/postgresql:16.6-19
+  imageName: ghcr.io/cloudnative-pg/postgresql:16.6-20
   instances: 3
   monitoring:
     enablePodMonitor: true
     podMonitorMetricRelabelings:
     - action: replace
       sourceLabels: