minor fixes

06_Day_Map_List_Keys/05_map_list_keys.md

@@ -97,7 +97,6 @@ Let's see how to map array of arrays
 import React from 'react'
 import ReactDOM from 'react-dom'
 
-const App = () => {
   const skills = [
     ['HTML', 10],
     ['CSS', 7],
@@ -268,4 +267,6 @@ ReactDOM.render(<App />, rootElement)
 
 3. ![Ten most highest populations](../images/day_6_ten_highest_populations_exercise.png)
 
+🎉 CONGRATULATIONS ! 🎉
+
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