feat(helm): update chart grafana ( 8.1.1 → 8.2.0 ) (#3905)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [grafana](https://grafana.com)
([source](https://togithub.com/grafana/helm-charts)) | minor | `8.1.1`
-> `8.2.0` |

---

### Release Notes

<details>
<summary>grafana/helm-charts (grafana)</summary>

###
[`v8.2.0`](https://togithub.com/grafana/helm-charts/releases/tag/grafana-8.2.0)

[Compare
Source](https://togithub.com/grafana/helm-charts/compare/grafana-8.1.1...grafana-8.2.0)

The leading tool for querying and visualizing time series and metrics.

#### What's Changed

- \[grafana] add support for dual stack clusters by
[@&#8203;M0NsTeRRR](https://togithub.com/M0NsTeRRR) in
[https://github.com/grafana/helm-charts/pull/3066](https://togithub.com/grafana/helm-charts/pull/3066)

#### New Contributors

- [@&#8203;M0NsTeRRR](https://togithub.com/M0NsTeRRR) made their first
contribution in
[https://github.com/grafana/helm-charts/pull/3066](https://togithub.com/grafana/helm-charts/pull/3066)

**Full Changelog**:
grafana/helm-charts@grafana-8.1.1...grafana-8.2.0

</details>

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy40MjAuMSIsInVwZGF0ZWRJblZlciI6IjM3LjQyMC4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJyZW5vdmF0ZS9oZWxtIiwidHlwZS9taW5vciJdfQ==-->

Co-authored-by: repo-jeeves[bot] <106431701+repo-jeeves[bot]@users.noreply.github.com>

kubernetes/main/apps/observability/grafana/app/helm-release.yaml

@@ -9,7 +9,7 @@ spec:
   chart:
     spec:
       chart: grafana
-      version: 8.1.1
+      version: 8.2.0
       sourceRef:
         kind: HelmRepository
         name: grafana-charts