chore(deps): update pgo docker tag to v5.7.1 (#328)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| pgo | patch | `5.7.0` -> `5.7.1` |

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cluster/apps/operators/crunchy-postgres-operator/helm-release.yaml

@@ -9,7 +9,7 @@ spec:
   chart:
     spec:
       chart: pgo
-      version: 5.7.0
+      version: 5.7.1
       sourceRef:
         kind: HelmRepository
         name: crunchydata