Snippet format update

To match the starter (for the migration)

snippets/sampleSize.md

@@ -1,4 +1,7 @@
-### sampleSize
+---
+title: sampleSize
+tags: array,random,intermediate
+---
 
 Gets `n` random elements at unique keys from `array` up to the size of `array`.
 
@@ -20,4 +23,4 @@ const sampleSize = ([...arr], n = 1) => {
 ```js
 sampleSize([1, 2, 3], 2); // [3,1]
 sampleSize([1, 2, 3], 4); // [2,3,1]
-```
+```