fix(helm): update chart kubernetes-dashboard to 6.0.8 (#747)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

kubernetes/apps/monitoring/kubernetes-dashboard/app/helmrelease.yaml

@@ -9,7 +9,7 @@ spec:
   chart:
     spec:
       chart: kubernetes-dashboard
-      version: 6.0.7
+      version: 6.0.8
       sourceRef:
         kind: HelmRepository
         name: kubernetes-dashboard