Bump jQuery to 3.6.3, refactor

Author: airbr

public/index.html

@@ -249,7 +249,7 @@ <h4>Score:<span id="score1">$ 0</span></h4>
             </div>
         </div>
     </div>
-    <script src="js/jquery-3.1.0.js"></script>
+    <script src="js/jquery-3.6.3.min.js"></script>
     <script src="js/bootstrap.min.js"></script>
     <script type="module" src="js/main.js"></script>