feat(helm): update chart grafana to 8.2.0

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
grafana (source)	minor	8.1.1 -> 8.2.0

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Release Notes

grafana/helm-charts (grafana)

### [`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 [@​M0NsTeRRR](https://togithub.com/M0NsTeRRR) in [https://github.com/grafana/helm-charts/pull/3066](https://togithub.com/grafana/helm-charts/pull/3066) #### New Contributors - [@​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**: https://github.com/grafana/helm-charts/compare/grafana-8.1.1...grafana-8.2.0

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