add snippet toKebabCase

snippets/arraySum.md

@@ -5,6 +5,6 @@ Returns the sum of an array of numbers.
 Use `Array.reduce()` to add each value to an accumulator, initialized with a value of `0`.
 
 ```js
-const arraySum = arr => arr.reduce((acc, val) => acc + val, 0);
+const arraySum = zarr => arr.reduce((acc, val) => acc + val, 0);
 // arraySum([1,2,3,4]) -> 10
 ```