feat(helm): update chart grafana to 8.1.1

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
grafana (source)	minor	8.0.2 -> 8.1.1

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Release Notes

grafana/helm-charts (grafana)

### [`v8.1.1`](https://togithub.com/grafana/helm-charts/releases/tag/grafana-8.1.1) The leading tool for querying and visualizing time series and metrics. #### What's Changed - \[grafana] Adding jkroepke as maintainer by [@​jkroepke](https://togithub.com/jkroepke) in [https://github.com/grafana/helm-charts/pull/3179](https://togithub.com/grafana/helm-charts/pull/3179) **Full Changelog**: https://github.com/grafana/helm-charts/compare/grafana-8.1.0...grafana-8.1.1 ### [`v8.1.0`](https://togithub.com/grafana/helm-charts/releases/tag/grafana-8.1.0) The leading tool for querying and visualizing time series and metrics. #### What's Changed - \[grafana] feat:Allow hiding persistence warning by [@​nikolaik](https://togithub.com/nikolaik) in [https://github.com/grafana/helm-charts/pull/3013](https://togithub.com/grafana/helm-charts/pull/3013) #### New Contributors - [@​nikolaik](https://togithub.com/nikolaik) made their first contribution in [https://github.com/grafana/helm-charts/pull/3013](https://togithub.com/grafana/helm-charts/pull/3013) **Full Changelog**: https://github.com/grafana/helm-charts/compare/alloy-0.4.0...grafana-8.1.0

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