add permissions also on k8s manifest

manifests/prometheus/prometheus-k8s-roles.yaml

@@ -47,5 +47,9 @@ kind: ClusterRole
 metadata:
   name: prometheus-k8s
 rules:
+- apiGroups: [""]
+  resources:
+  - nodes/metrics
+  verbs: ["get"]
 - nonResourceURLs: ["/metrics"]
   verbs: ["get"]