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/gatus/Chart.lock

@@ -4,9 +4,9 @@ dependencies:
   version: 1.5.0
 - name: postgres-cluster
   repository: oci://harbor.alexlebens.net/helm-charts
-  version: 7.5.1
+  version: 7.6.0
 - name: volsync-target
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 0.7.0
-digest: sha256:327091258e0174bea1932e66b0a1a7b54b475365cf23fe776b37ac446ae3c7e9
-generated: "2026-02-10T21:50:24.906374-06:00"
+digest: sha256:e0facbb88b229a3160f1e24f36b80e577d2cd3408f501d5fced4e4e1dc639195
+generated: "2026-02-13T19:38:24.989422261Z"