an missing bracket has been fixed

06_Day_Map_List_Keys/05_map_list_keys.md

@@ -131,7 +131,7 @@ const App = () => {
   }
 
 const rootElement = document.getElementById('root')
-ReactDOM.render(<App />, rootElement)
+ReactDOM.render(<App />, rootElement)}
 ```
 
 ### Mapping array of objects