fix(helm): update chart cloudnative-pg to 0.20.2 (#5664)

| datasource | package        | from   | to     |
| ---------- | -------------- | ------ | ------ |
| helm       | cloudnative-pg | 0.20.1 | 0.20.2 |

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

kubernetes/main/apps/databases/cloudnative-pg/app/helmrelease.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: cloudnative-pg
-      version: 0.20.1
+      version: 0.20.2
       sourceRef:
         kind: HelmRepository
         name: cloudnative-pg