Snippet format update

To match the starter (for the migration)

snippets/offset.md

@@ -1,4 +1,7 @@
-### offset
+---
+title: offset
+tags: array,beginner
+---
 
 Moves the specified amount of elements to the end of the array.
 
@@ -13,4 +16,4 @@ const offset = (arr, offset) => [...arr.slice(offset), ...arr.slice(0, offset)];
 ```js
 offset([1, 2, 3, 4, 5], 2); // [3, 4, 5, 1, 2]
 offset([1, 2, 3, 4, 5], -2); // [4, 5, 1, 2, 3]
-```
+```