add hooks thing from swyx

exercises/01.latest-ref/README.mdx

@@ -169,6 +169,9 @@ It's important that you understand the trade-offs here! Remember, when we do
 this we're going back to the class component default. So just think about the
 unexpected behavior's you'll get when you switch the default like this.
 
+📜 For more on hooks and closures, check
+[Getting Closure on React Hooks](https://www.swyx.io/hooks)
+
 📜 For more on this subject, read
 [How React Uses Closures to Avoid Bugs](https://epicreact.dev/how-react-uses-closures-to-avoid-bugs).