Snippet format update

To match the starter (for the migration)

snippets/stableSort.md

@@ -1,4 +1,7 @@
-### stableSort
+---
+title: stableSort
+tags: array,sort,advanced,intermediate
+---
 
 Performs stable sorting of an array, preserving the initial indexes of items when their values are the same.
 Does not mutate the original array, but returns a new array instead.
@@ -18,4 +21,4 @@ const stableSort = (arr, compare) =>
 ```js
 const arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
 const stable = stableSort(arr, () => 0); // [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
-```
+```