Update Solution3.js

Author: yanglbme

solution/0900-0999/0921.Minimum Add to Make Parentheses Valid/Solution3.js

@@ -1,6 +1,9 @@
-function minAddToMakeValid(s: string): number {
+/**
+ * @param {string} s
+ * @return {number}
+ */
+var minAddToMakeValid = function (s) {
     const l = s.length;
     s = s.replace('()', '');
-
     return s.length === l ? l : minAddToMakeValid(s);
-}
+};