chore(deps): update helm release cloudnative-pg to v0.21.1 (#458)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [cloudnative-pg](https://cloudnative-pg.io) ([source](https://github.com/cloudnative-pg/charts)) | patch | `0.21.0` -> `0.21.1` |

---

### Release Notes

<details>
<summary>cloudnative-pg/charts (cloudnative-pg)</summary>

### [`v0.21.1`](https://github.com/cloudnative-pg/charts/releases/tag/cloudnative-pg-v0.21.1)

[Compare Source](cloudnative-pg/charts@cloudnative-pg-v0.21.0...cloudnative-pg-v0.21.1)

CloudNativePG Operator Helm Chart

#### What's Changed

-   fix: Bump chart dependency grafana-dashboards to version 0.0.2 by [@&#8203;dexter136](https://github.com/dexter136) in cloudnative-pg/charts#270

#### New Contributors

-   [@&#8203;dexter136](https://github.com/dexter136) made their first contribution in cloudnative-pg/charts#270

**Full Changelog**: cloudnative-pg/charts@cloudnative-pg-v0.21.0...cloudnative-pg-v0.21.1

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4zMjYuMCIsInVwZGF0ZWRJblZlciI6IjM3LjMyNi4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Reviewed-on: https://git.internal/nrdufour/home-ops/pulls/458
Co-authored-by: Renovate <[email protected]>
Co-committed-by: Renovate <[email protected]>

kubernetes/main/apps/database/cloudnative-pg/app/helm-release.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: cloudnative-pg
-      version: 0.21.0
+      version: 0.21.1
       sourceRef:
         kind: HelmRepository
         name: cloudnative-pg