added a new line in the instructions

Author: vzaidman

README.md

@@ -129,6 +129,7 @@ This can be done by updating the `package.json` and configuration files in `scri
 1. `cd react-native-website` to go into the project root.
 1. `cd website` to go into the website portion of the project.
 1. Run `yarn version:cut <newVersion>` where `<newVersion>` is the new version being released (e.g. `0.81`).
+1. Open a PR and commit this change as "Cut branch <newVersion>"
 
 ## 🔧 Website configuration