Add step to release instructions

Author: brianr

RELEASE.md

@@ -1,3 +1,6 @@
 ## Release
 
-To release a new version of this action, navigate to [the releases page](https://github.com/rollbar/github-deploy-action/releases) and click "Draft a new release".
+To release a new version of this action:
+
+- Navigate to [the releases page](https://github.com/rollbar/github-deploy-action/releases) and click "Draft a new release".
+- After releasing, update the README.md in this repo to put the new version number in the examples, as shown in [#29](https://github.com/rollbar/github-deploy-action/pull/29)