Apply suggestions from code review

Author: kentcdodds

exercises/02.side-effects/01.problem.effects/index.tsx

@@ -19,7 +19,7 @@ function App() {
 
 	// 🐨 add a useEffect(() => {}, []) call here (we'll talk about that empty array later)
 	// 🐨 in the useEffect callback, subscribe to window's popstate event
-	// 🐨 if that doesn't make sense to you... don't worry, it's supposed to be broken!
+	// 🦉 if that doesn't make sense to you... don't worry, it's supposed to be broken! We'll fix it next
 	// 🐨 your event handler should call setQuery to getQueryParam()
 	// 📜 https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener