Snippet format update

To match the starter (for the migration)

snippets/deepGet.md

@@ -1,4 +1,7 @@
-### deepGet
+---
+title: deepGet
+tags: object,intermediate
+---
 
 Returns the target value in a nested JSON object, based on the `keys` array.
 
@@ -22,4 +25,4 @@ const data = {
 };
 deepGet(data, ['foo', 'foz', index]); // get 3
 deepGet(data, ['foo', 'bar', 'baz', 8, 'foz']); // null
-```
+```