chore(deps): update postgres-cluster docker tag to v7.12.1

clusters/cl01tl/helm/matrix-synapse/Chart.lock

@@ -19,7 +19,7 @@ dependencies:
   version: 2.6.0
 - name: postgres-cluster
   repository: oci://harbor.alexlebens.net/helm-charts
-  version: 7.11.2
+  version: 7.12.1
 - name: valkey
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 0.6.1
@@ -38,5 +38,5 @@ dependencies:
 - name: volsync-target
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 0.8.0
-digest: sha256:315375d66ed67381a6e3bcf68dc50858bf28002b349d38d768b28fbd7f33ade7
-generated: "2026-04-24T21:08:20.922701301Z"
+digest: sha256:0aa25432d39df6c2fcea939bc32029bbdfb63b8028d1bf68b5cfe4bbdaabe7a0
+generated: "2026-04-24T21:55:08.454508081Z"