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

clusters/cl01tl/helm/gitea/Chart.lock

@@ -13,7 +13,7 @@ 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
@@ -23,5 +23,5 @@ dependencies:
 - name: volsync-target
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 0.7.0
-digest: sha256:0b376cdddc09bf3346d7c9789452a0bfe6af630faf3b005e75426f5a3635ef1f
-generated: "2026-02-07T02:28:33.614969361Z"
+digest: sha256:ea21ed8ec7d03a5a49345eef3636c4cb6a647211e4952e9291047f92b9ed035e
+generated: "2026-02-13T19:38:46.206905532Z"

clusters/cl01tl/helm/gitea/Chart.yaml

@@ -39,7 +39,7 @@ dependencies:
     version: 2.3.0
   - name: postgres-cluster
     alias: postgres-18-cluster
-    version: 7.5.1
+    version: 7.6.0
     repository: oci://harbor.alexlebens.net/helm-charts
   - name: redis-replication
     alias: redis-replication-gitea