add react-router recipe to readme

README.md

@@ -95,6 +95,7 @@ Available recipes include:
 
 - [**next**](https://github.com/measuredco/puck/tree/main/recipes/next): Next.js 13 app example, using App Router and static page generation
 - [**remix**](https://github.com/measuredco/puck/tree/main/recipes/remix): Remix Run v2 app example, using dynamic routes at root-level
+- [**react-router**](https://github.com/measuredco/puck/tree/main/recipes/react-router): React Router v7 app example, using dynamic routes to create pages at any level
 
 ## Community