chore(deps): update postgres-cluster docker tag to v7.6.0

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

@@ -19,7 +19,7 @@ dependencies:
   version: 2.3.0
 - name: postgres-cluster
   repository: oci://harbor.alexlebens.net/helm-charts
-  version: 7.5.1
+  version: 7.6.0
 - name: redis-replication
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 1.0.4
@@ -38,5 +38,5 @@ dependencies:
 - name: volsync-target
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 0.7.0
-digest: sha256:d373bf3fea08bde2c3eea21d421f9d0d385ee141be60229427f281d2fbae4c54
-generated: "2026-02-07T02:31:51.33670708Z"
+digest: sha256:637590b4155bfffcf28b83fa169f0de80211cb78c8258f8d4da8ff7749cc61df
+generated: "2026-02-13T19:41:15.741352865Z"