fix(curriculum): add example for arrow functions in Platformer Game (#54982)

Co-authored-by: Naomi <accounts+github@nhcarrigan.com>
Co-authored-by: Lasse Jørgensen <28780271+lasjorg@users.noreply.github.com>

curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c72e52133d687e8e6a60f6.md

@@ -13,6 +13,14 @@ Start by adding an `addEventListener` to the global `window` object.
 
 For the arguments, pass in the `keydown` event and an arrow function that uses the destructuring assignment to get the `key` property from the `event` object in the event listener parameter. 
 
+Here is the syntax for using the destructuring assignment in the parameter list of the arrow function:
+
+```js
+btn.addEventListener('click', ({ target }) => {
+  console.log(target);
+});
+```
+
 # --hints--
 
 You need to add an `addEventListener` to the global `window` object.