Update Helm release grafana to v8.4.8

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
grafana (source)	patch	8.4.7 -> 8.4.8

---

[!WARNING] Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

---

Release Notes

grafana/helm-charts (grafana)

### [`v8.4.8`](https://togithub.com/grafana/helm-charts/releases/tag/grafana-8.4.8) [Compare Source](https://togithub.com/grafana/helm-charts/compare/grafana-8.4.7...grafana-8.4.8) The leading tool for querying and visualizing time series and metrics. #### What's Changed - \[grafana] fixed url link for persistent volume claim in values.yaml by [@​usmangt](https://togithub.com/usmangt) in [https://github.com/grafana/helm-charts/pull/2881](https://togithub.com/grafana/helm-charts/pull/2881) #### New Contributors - [@​usmangt](https://togithub.com/usmangt) made their first contribution in [https://github.com/grafana/helm-charts/pull/2881](https://togithub.com/grafana/helm-charts/pull/2881) **Full Changelog**: https://github.com/grafana/helm-charts/compare/alloy-0.6.1...grafana-8.4.8

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - "after 11pm,before 5am" in timezone America/Chicago.

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.