tip calculator exercise script added

Author: zonayedpca

index.html

@@ -45,6 +45,6 @@ <h2>Tip Calculator</h2>
         </ul>
       </div>
     </div>
-    <script src="script-solved.js" charset="utf-8"></script>
+    <script src="script.js" charset="utf-8"></script>
   </body>
 </html>