Update isValidJSON.md

snippets/isValidJSON.md

@@ -5,7 +5,7 @@ Checks if the provided argument is a valid JSON.
 Use `JSON.parse()` and a `try... catch` block to check if the provided argument is a valid JSON.
 
 ```js
-const arr = (obj) => {
+const isValidJSON = obj => {
   try{
     JSON.parse(obj);
     return true;