chore(teuto-cnpg/dependencies): pin ghcr.io/cloudnative-pg/postgresql docker tag to 6e0bdf6

Author: renovate[bot]

charts/teuto-cnpg/values.yaml

@@ -1,7 +1,7 @@
 databaseImage:
   registry: ghcr.io
   repository: cloudnative-pg/postgresql
-  tag: "16.1"
+  tag: "16.1@sha256:6e0bdf657ef224339abc6cd7ad669b049fb26875e7d9456d46bf40ff38e26b1b"
 instances: 3
 logLevel: info
 storageSize: 1Gi