Update snippet descriptions

snippets/stringifyCircularJSON.md

@@ -5,7 +5,7 @@ tags: object,advanced
 
 Serializes a JSON object containing circular references into a JSON format.
 
-- Create a `WeakSet` to store and check seen values, using `WeakSet.prototype.add()` and `WeakSet.prototype.has()`.
+- Create a `new WeakSet()` to store and check seen values, using `WeakSet.prototype.add()` and `WeakSet.prototype.has()`.
 - Use `JSON.stringify()` with a custom replacer function that omits values already in `seen`, adding new values as necessary.
 - ⚠️ **NOTICE:** This function finds and removes circular references, which causes circular data loss in the serialized JSON.