feat(helm): update loki ( 6.7.3 → 6.9.0 ) (#5162)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [loki](https://grafana.github.io/helm-charts)
([source](https://togithub.com/grafana/helm-charts)) | minor | `6.7.3`
-> `6.9.0` |

---

### Release Notes

<details>
<summary>grafana/helm-charts (loki)</summary>

###
[`v6.9.0`](https://togithub.com/grafana/helm-charts/releases/tag/helm-loki-6.9.0)

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

Source commit:
grafana/loki@1bf9791

Tag on source:
https://github.com/grafana/loki/releases/tag/helm-loki-6.9.0

###
[`v6.8.0`](https://togithub.com/grafana/helm-charts/releases/tag/helm-loki-6.8.0)

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

Source commit:
grafana/loki@3be5a45

Tag on source:
https://github.com/grafana/loki/releases/tag/helm-loki-6.8.0

###
[`v6.7.4`](https://togithub.com/grafana/helm-charts/releases/tag/helm-loki-6.7.4)

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

Source commit:
grafana/loki@bdfc86b

Tag on source:
https://github.com/grafana/loki/releases/tag/helm-loki-6.7.4

</details>

---

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---

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kubernetes/kyak/apps/monitoring/loki/app/helmrelease.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: loki
-      version: 6.7.3
+      version: 6.9.0
       sourceRef:
         kind: HelmRepository
         name: grafana