feat(helm): update kube-prometheus-stack ( 67.8.0 → 67.9.0 ) (#7969)

| datasource | package               | from   | to     |
| ---------- | --------------------- | ------ | ------ |
| helm       | kube-prometheus-stack | 67.8.0 | 67.9.0 |

Co-authored-by: rosey-the-renovator-bot[bot] <98764075+rosey-the-renovator-bot[bot]@users.noreply.github.com>

kubernetes/main/apps/monitoring/kube-prometheus-stack/app/helmrelease.yaml

@@ -11,7 +11,7 @@ spec:
   chart:
     spec:
       chart: kube-prometheus-stack
-      version: 67.8.0
+      version: 67.9.0
       sourceRef:
         kind: HelmRepository
         name: prometheus-community-charts