Update docs/stable overlay images for 1.2 release

Author: saad-ali

Diff for: README.md

@@ -12,7 +12,7 @@ lifecycle of Google Compute Engine Persistent Disks.
 ## Project Status
 
 Status: GA
-Latest stable image: `gcr.io/gke-release/gcp-compute-persistent-disk-csi-driver:v1.1.0-gke.0`
+Latest stable image: `gcr.io/gke-release/gcp-compute-persistent-disk-csi-driver:v1.2.0-gke.0`
 
 ### Test Status
 

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

@@ -51,5 +51,5 @@ imageTag:
   name: gke.gcr.io/gcp-compute-persistent-disk-csi-driver
   # Don't change stable image without changing pdImagePlaceholder in
   # test/k8s-integration/main.go
-  newTag: "v1.1.0-gke.0"
+  newTag: "v1.2.0-gke.0"
 ---