chore(deps): update postgres-cluster docker tag to v7.7.0 (#4140)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [postgres-cluster](https://github.com/cloudnative-pg/cloudnative-pg) | minor | `7.6.0` → `7.7.0` |

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<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4yNS43IiwidXBkYXRlZEluVmVyIjoiNDMuMjUuNyIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiaW1hZ2UiXX0=-->

Reviewed-on: #4140
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/helm/sonarr-4k/Chart.lock

@@ -4,9 +4,9 @@ dependencies:
   version: 4.6.2
 - name: postgres-cluster
   repository: oci://harbor.alexlebens.net/helm-charts
-  version: 7.6.0
+  version: 7.7.0
 - name: volsync-target
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 0.7.0
-digest: sha256:7137477df5c68cbe4d1cf28eb1756705b0da404265a25a2f2a426a0feb81749e
-generated: "2026-02-13T19:44:26.232725193Z"
+digest: sha256:4dddbb91207de832c71353555e3fd41891c47bae2d9616eea91667c6406f7dff
+generated: "2026-02-21T20:04:53.946751379Z"

clusters/cl01tl/helm/sonarr-4k/Chart.yaml

@@ -27,7 +27,7 @@ dependencies:
     version: 4.6.2
   - name: postgres-cluster
     alias: postgres-18-cluster
-    version: 7.6.0
+    version: 7.7.0
     repository: oci://harbor.alexlebens.net/helm-charts
   - name: volsync-target
     alias: volsync-target-config