fix: add console log for square function with example input and corrected error missing )

Author: CatchingKiyoko

Sprint-2/1-key-errors/2.js

@@ -29,4 +29,5 @@ SyntaxError: Unexpected number
 function square(num){
     return num * num;
 }
+console.log(square(3));
 console.log(square(10));