Snippet format update

To match the starter (for the migration)

snippets/drop.md

@@ -1,4 +1,7 @@
-### drop
+---
+title: drop
+tags: array,beginner
+---
 
 Returns a new array with `n` elements removed from the left.
 
@@ -12,4 +15,4 @@ const drop = (arr, n = 1) => arr.slice(n);
 drop([1, 2, 3]); // [2,3]
 drop([1, 2, 3], 2); // [3]
 drop([1, 2, 3], 42); // []
-```
+```