fix: RBAC config to access namespaces (#177)

external-secrets raises access denied accessing namespaces

Author: muenchhausen

charts/kubernetes-external-secrets/templates/rbac.yaml

@@ -12,6 +12,9 @@ rules:
   - apiGroups: [""]
     resources: ["secrets"]
     verbs: ["create", "update"]
+  - apiGroups: [""]
+    resources: ["namespaces"]
+    verbs: ["get", "watch", "list"]
   - apiGroups: ["apiextensions.k8s.io"]
     resources: ["customresourcedefinitions"]
     verbs: ["create"]