chore(deps): update helm release kube-prometheus-stack to v91.2.0

Author: h8s-renovate[bot]

ci-cd/argocd/environments/prod/apps/prometheus-stack-helm.yaml

@@ -10,7 +10,7 @@ spec:
   sources:
     - repoURL: https://prometheus-community.github.io/helm-charts
       chart: kube-prometheus-stack
-      targetRevision: 91.0.0
+      targetRevision: 91.2.0
       helm:
         releaseName: prometheus-stack
         valueFiles: