chore(deps): update helm release loki to v6.6.4

This MR contains the following updates:

Package	Update	Change
loki (source)	patch	6.6.3 -> 6.6.4

---

Release Notes

grafana/helm-charts (loki)

v6.6.4

Helm chart for Grafana Loki and Grafana Enterprise Logs supporting both simple, scalable and distributed modes.

Source commit: https://github.com/grafana/loki/commit/05176e445b90597379c268e799b0fb86b8629b9e

Tag on source: https://github.com/grafana/loki/releases/tag/helm-loki-6.6.4

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

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

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

---

• If you want to rebase/retry this MR, check this box

---

This MR has been generated by Renovate Bot.