Merge pull request #253 from s6n-jp/renovate/grafana-8.x

build(deps): update helm release grafana to v8.11.2

Author: siketyan

apps/grafana/app.yaml

@@ -11,7 +11,7 @@ spec:
   sources:
     - repoURL: https://grafana.github.io/helm-charts
       chart: grafana
-      targetRevision: "8.11.1"
+      targetRevision: "8.11.2"
       helm:
         valueFiles:
         - $k8s/apps/grafana/values.yaml