fix: 🐛 more details for navigation context

✅ Closes: #248

Author: MatthysDev

challenges/react-navigation/03.md

@@ -39,7 +39,7 @@ It should look like this:
 <Button title="Sign in" onPress={() => setUser(!user)} />
 ```
 
-You can read the documentation [https://reactnavigation.org/docs/auth-flow](https://reactnavigation.org/docs/auth-flow).
+- [ ] Look at the documentation [React Navigation Auth Flow](https://reactnavigation.org/docs/auth-flow) and add a Context to manage the user state in the application.
 
 **🔭 Hint:** For now you can emulate the token with a simple `useState`.