feat(container): update image ghcr.io/cloudnative-pg/postgresql to v14.15-19

[renovate]

This PR contains the following updates:

Package	Update	Change
ghcr.io/cloudnative-pg/postgresql	minor	14.9-12 -> 14.15-19

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[github-actions]

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

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

@@ -20,13 +20,13 @@

           name: cloudnative-pg-secret
       serverName: postgres-v1
       wal:
         compression: bzip2
         maxParallel: 8
     retentionPolicy: 30d
-  imageName: ghcr.io/cloudnative-pg/postgresql:14.9-12
+  imageName: ghcr.io/cloudnative-pg/postgresql:14.13-39
   inheritedMetadata:
     labels:
       kube-image-keeper.enix.io/image-caching-policy: ignore
   instances: 3
   monitoring:
     enablePodMonitor: true