update App test case

Author: ilyasudakov

src/components/App.test.js

@@ -1,6 +1,6 @@
 import React from 'react';
 import { render } from '@testing-library/react';
-import App from './App.jsx';
+import { App } from './App.jsx';
 
 describe('App component', () => {
   test('renders', () => {