Use v1.9.0-rc3

Author: sunnylovestiramisu

deploy/kubernetes/images/prow-stable-sidecar-rc-master/image.yaml

@@ -48,6 +48,6 @@ metadata:
 imageTag:
   name: k8s.gcr.io/cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver
   newName: gcr.io/k8s-staging-cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver
-  newTag: "v1.9.0-rc1"
+  newTag: "v1.9.0-rc3"
 ---