feat: add highlights to lab5

docs/labs/week5/2.md

@@ -286,7 +286,7 @@ This function listens for a change in the checkbox and then toggles the visibili
 
 We need to then add this function to the `createCheckboxForCategory` function:
 
-```js title="js/init.js" 
+```js title="js/init.js" 　hl_lines="14"
 function createCheckboxForCategory(category, filterGroup) {
 	const input = document.createElement('input');
 	input.type = 'checkbox';