Update Helm release grafana to v8.6.1

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
grafana (source)	patch	8.6.0 -> 8.6.1

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Release Notes

grafana/helm-charts (grafana)

### [`v8.6.1`](https://redirect.github.com/grafana/helm-charts/releases/tag/grafana-8.6.1) [Compare Source](https://redirect.github.com/grafana/helm-charts/compare/grafana-8.6.0...grafana-8.6.1) The leading tool for querying and visualizing time series and metrics. #### What's Changed - \[grafana] Update Grafana version to 11.3.1 by [@​tobiasamft](https://redirect.github.com/tobiasamft) in [https://github.com/grafana/helm-charts/pull/3435](https://redirect.github.com/grafana/helm-charts/pull/3435) **Full Changelog**: https://github.com/grafana/helm-charts/compare/oncall-1.13.3...grafana-8.6.1

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