Add resources to useReducer (#6372)

src/data/roadmaps/react/content/usereducer@v48Mv0wQqjXbvy8x6gDjQ.md

@@ -1 +1,9 @@
 # useReducer
+
+useReducer: An alternative to useState. Accepts a reducer of type (state, action) => newState, and returns the current state paired with a dispatch method. (If you’re familiar with Redux, you already know how this works.)
+
+Learn more from the following resources:
+
+- [@official@useReducer Docs](https://react.dev/reference/react/useReducer)
+- [@article@The React useReducer Hook](https://www.telerik.com/blogs/react-usereducer-hook)
+- [@article@A guide to the React useReducer Hook](https://blog.logrocket.com/react-usereducer-hook-ultimate-guide/)