corrected the typo error

01_Day_JavaScript_Refresher/01_javascript_refresher.md

@@ -3187,7 +3187,7 @@ Destructuring function parameter
 ```js
 const rectangle = { width: 20, height: 10 }
 const calcualteArea = ({ width, height }) => width * height
-const calculatePerimeter = ({ width, height } = 2 * (width + height))
+const calculatePerimeter = ({ width, height }) => 2 * (width + height)
 ```
 
 #### Exercises