Snippet format update

To match the starter (for the migration)

snippets/allEqual.md

@@ -1,4 +1,7 @@
-### allEqual
+---
+title: allEqual
+tags: array,function,beginner
+---
 
 Check if all elements in an array are equal.
 
@@ -12,4 +15,4 @@ const allEqual = arr => arr.every(val => val === arr[0]);
 ```js
 allEqual([1, 2, 3, 4, 5, 6]); // false
 allEqual([1, 1, 1, 1]); // true
-```
+```