Snippet format update

To match the starter (for the migration)

snippets/escapeRegExp.md

@@ -1,4 +1,7 @@
-### escapeRegExp
+---
+title: escapeRegExp
+tags: string,regexp,intermediate
+---
 
 Escapes a string to use in a regular expression.
 
@@ -10,4 +13,4 @@ const escapeRegExp = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
 
 ```js
 escapeRegExp('(test)'); // \\(test\\)
-```
+```