Update postgres-cluster Docker tag to v7.4.5 (#2892)

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

@@ -19,7 +19,7 @@ dependencies:
   version: 2.1.4
 - name: postgres-cluster
   repository: oci://harbor.alexlebens.net/helm-charts
-  version: 7.4.4
+  version: 7.4.5
 - name: redis-replication
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 0.5.0
@@ -38,5 +38,5 @@ dependencies:
 - name: volsync-target
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 0.7.0
-digest: sha256:f46430b60914faed17a656af1ab34fcb534ef059c35f2b052a14297bd73be34f
-generated: "2025-12-27T13:31:33.620631-06:00"
+digest: sha256:a2eed4dbe5dbe456d38e67d8b312873a6520b558e599b511664fa93eb92cb3d1
+generated: "2025-12-27T19:47:13.888596032Z"