Snippet format update

To match the starter (for the migration)

snippets/hasClass.md

@@ -1,4 +1,7 @@
-### hasClass
+---
+title: hasClass
+tags: browser,css,beginner
+---
 
 Returns `true` if the element has the specified class, `false` otherwise.
 
@@ -10,4 +13,4 @@ const hasClass = (el, className) => el.classList.contains(className);
 
 ```js
 hasClass(document.querySelector('p.special'), 'special'); // true
-```
+```