fix(helm): update grafana ( 8.4.6 → 8.4.7 )

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
grafana (source)	patch	8.4.6 -> 8.4.7

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Release Notes

grafana/helm-charts (grafana)

### [`v8.4.7`](https://togithub.com/grafana/helm-charts/releases/tag/grafana-8.4.7) [Compare Source](https://togithub.com/grafana/helm-charts/compare/grafana-8.4.6...grafana-8.4.7) The leading tool for querying and visualizing time series and metrics. #### What's Changed - \[grafana] Update README.md by [@​NWilkieTechno](https://togithub.com/NWilkieTechno) in [https://github.com/grafana/helm-charts/pull/3285](https://togithub.com/grafana/helm-charts/pull/3285) #### New Contributors - [@​NWilkieTechno](https://togithub.com/NWilkieTechno) made their first contribution in [https://github.com/grafana/helm-charts/pull/3285](https://togithub.com/grafana/helm-charts/pull/3285) **Full Changelog**: https://github.com/grafana/helm-charts/compare/grafana-8.4.6...grafana-8.4.7

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