chore(deps): update helm release loki to v6.6.5 (#61)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [loki](https://grafana.github.io/helm-charts)
([source](https://togithub.com/grafana/helm-charts)) | helm_release |
patch | `v6.6.3` -> `6.6.5` |

---

### Release Notes

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

###
[`v6.6.5`](https://togithub.com/grafana/helm-charts/releases/tag/helm-loki-6.6.5)

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

Source commit:
grafana/loki@29f1ea9

Tag on source:
https://github.com/grafana/loki/releases/tag/helm-loki-6.6.5

###
[`v6.6.4`](https://togithub.com/grafana/helm-charts/releases/tag/helm-loki-6.6.4)

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

Source commit:
grafana/loki@05176e4

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

</details>

---

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terraform/loki/loki.tf

@@ -37,7 +37,7 @@ resource "helm_release" "loki" {
   chart            = "loki"
   namespace        = var.namespace_name
   create_namespace = true
-  version          = "v6.6.3"
+  version          = "6.6.5"
 
   dynamic "set" {
     for_each = local.values