docs: use latest release in cloud deploy button
@@ -63,7 +63,7 @@ moov-ach-demo
Click the button below to deploy this project to Google Cloud
-[![Run on Google Cloud](https://deploy.cloud.run/button.svg)](https://deploy.cloud.run/?git_repo=https://github.com/moov-io/ach&revision=master)
+[![Run on Google Cloud](https://deploy.cloud.run/button.svg)](https://deploy.cloud.run/?git_repo=https://github.com/moov-io/ach&revision=latest)
In the cloud shell you should be prompted with
