update cluster role for snapshot status

Author: wackxu

deploy/kubernetes/rbac-external-provisioner.yaml

@@ -39,6 +39,9 @@ rules:
   - apiGroups: ["snapshot.storage.k8s.io"]
     resources: ["volumesnapshots"]
     verbs: ["get", "list"]
+  - apiGroups: ["snapshot.storage.k8s.io"]
+    resources: ["volumesnapshots/status"]
+    verbs: ["update"]
   - apiGroups: ["snapshot.storage.k8s.io"]
     resources: ["volumesnapshotcontents"]
     verbs: ["get", "list"]