Upgrade image from v1.13.2 to v1.15.0

Author: travisyx

Diff for: README.md

@@ -12,7 +12,7 @@ lifecycle of Google Compute Engine Persistent Disks.
 ## Project Status
 
 Status: GA
-Latest stable image: `registry.k8s.io/cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver:v1.13.2`
+Latest stable image: `registry.k8s.io/cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver:v1.15.0`
 
 ### Test Status
 

Diff for: deploy/kubernetes/images/stable-master/image.yaml

@@ -52,5 +52,5 @@ imageTag:
   # Don't change stable image without changing pdImagePlaceholder in
   # test/k8s-integration/main.go
   newName: registry.k8s.io/cloud-provider-gcp/gcp-compute-persistent-disk-csi-driver
-  newTag: "v1.13.2"
+  newTag: "v1.15.0"
 ---