Snippet format update

To match the starter (for the migration)

snippets/pullAtValue.md

@@ -1,4 +1,7 @@
-### pullAtValue
+---
+title: pullAtValue
+tags: array,advanced
+---
 
 Mutates the original array to filter out the values specified. Returns the removed elements.
 
@@ -20,4 +23,4 @@ const pullAtValue = (arr, pullArr) => {
 ```js
 let myArray = ['a', 'b', 'c', 'd'];
 let pulled = pullAtValue(myArray, ['b', 'd']); // myArray = [ 'a', 'c' ] , pulled = [ 'b', 'd' ]
-```
+```