Update index.html

Update the game over message to be a little more friendly.

index.html

@@ -47,7 +47,7 @@ <h1>Tic Tac Toe</h1>
   </tr>
 </table>
 
-<h2 hidden>Game over, refresh to play again 🧑‍💻 🤖!</h2>
+<h2 hidden>Game over! No worries, just refresh to play again 🧑‍💻 🤖!</h2>
 
 <script>
   // Initialization