Cloudshell link fix

README.md

@@ -121,7 +121,7 @@ In the diagram, note:
 
 Click the button below to run the demo in a [Google Cloud Shell](https://cloud.google.com/shell/docs/).
 
-[![Open in Cloud Shell](http://gstatic.com/cloudssh/images/open-btn.svg)](https://console.cloud.google.com/cloudshell/open?git_repo=https%3A%2F%2Fgithub.com%2FGoogleCloudPlatform%2Fgke-istio-telemetry-demo&page=editor&tutorial=README.md)
+[![Open in Cloud Shell](http://gstatic.com/cloudssh/images/open-btn.svg)](https://console.cloud.google.com/cloudshell/open?cloudshell_git_repo=https://github.com/GoogleCloudPlatform/gke-istio-telemetry-demo.git&https://github.com/GoogleCloudPlatform/gke-istio-shared.git&cloudshell_image=gcr.io/graphite-cloud-shell-images/terraform:latest&cloudshell_tutorial=README.md)
 
 All the tools for the demo are installed. When using Cloud Shell execute the following
 command in order to setup gcloud cli. When executing this command please setup your region