fix image repo

Change-Id: I0e877ab583c8b985afb7f2f11c149cd409851261

Author: mattcary

deploy/kubernetes/images/prow-gke-release-staging-rc-master/image.yaml

@@ -31,7 +31,7 @@ metadata:
   name: imagetag-csi-gce-driver-prow-rc
 imageTag:
   name: gke.gcr.io/gcp-compute-persistent-disk-csi-driver
-  newName: gcr.io/gke-release-staging/gcp-compute-persistent-disk-csi-driver
+  newName: gcr.io/k8s-staging-cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver
   newTag: "v1.3.0-rc1"
 ---