chore(deps): update postgres-cluster docker tag to v7.6.0 (#3958)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [postgres-cluster](https://github.com/cloudnative-pg/cloudnative-pg) | minor | `7.5.1` → `7.6.0` |

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### Configuration

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4zLjYiLCJ1cGRhdGVkSW5WZXIiOiI0My4zLjYiLCJ0YXJnZXRCcmFuY2giOiJtYWluIiwibGFiZWxzIjpbImNoYXJ0IiwiaW1hZ2UiXX0=-->

Reviewed-on: #3958
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/helm/photoview/Chart.lock

@@ -4,6 +4,6 @@ dependencies:
   version: 4.6.2
 - name: postgres-cluster
   repository: oci://harbor.alexlebens.net/helm-charts
-  version: 7.5.1
-digest: sha256:00b4fff6726d8bb1c7d8cd7ad9a1717d91f9d5d8ba1785527e0a49a665c6f76a
-generated: "2026-02-07T02:32:37.367202037Z"
+  version: 7.6.0
+digest: sha256:ba595849341d49b60975c4c12c985c16214f1732275c35a59a3e48bc33d012c4
+generated: "2026-02-13T19:42:18.910404668Z"

clusters/cl01tl/helm/photoview/Chart.yaml

@@ -20,7 +20,7 @@ dependencies:
     version: 4.6.2
   - name: postgres-cluster
     alias: postgres-18-cluster
-    version: 7.5.1
+    version: 7.6.0
     repository: oci://harbor.alexlebens.net/helm-charts
 icon: https://cdn.jsdelivr.net/gh/selfhst/icons/png/photoview.png
 # renovate: datasource=github-releases depName=photoview/photoview