update description regarding forEach method on Set

1-js/05-data-types/07-map-set-weakmap-weakset/article.md

@@ -222,7 +222,7 @@ set.forEach((value, valueAgain, set) => {
 });
 ```
 
-Note the funny thing. The `forEach` function in the `Set` has 3 arguments: a value, then *again a value*, and then the target object. Indeed, the same value appears in the arguments twice.
+Note the funny thing. The callback function passed in `forEach` has 3 arguments: a value, then *again a value*, and then the target object. Indeed, the same value appears in the arguments twice.
 
 That's for compatibility with `Map` where `forEach` has three arguments. Looks a bit strange, for sure. But may help to replace `Map` with `Set` in certain cases with ease, and vice versa.