Correction erreurs de compilations

src/App.js

-import React, { useEffect, useState } from 'react';
+import React, { useState } from 'react';
 import Board from './components/Board';
 import './styles.scss';
 import confettis from './assets/confetti-4.gif'

src/components/Cell.js

@@ -7,7 +7,7 @@ const Cell = ({ value, onClick }) => {
   return (
     <div className="cell" onClick={onClick} data-testid="cell">
         {
-            value !==0 && <img className='jeton' src={value===1 ? player1 : player2} />
+            value !==0 && <img className='jeton' alt='jeton' src={value===1 ? player1 : player2} />
         }
     </div>
   );