fixed copy emoji function

Author: Sabeer-Junaid

index.html

@@ -1537,6 +1537,6 @@ <h2 class="text-xl font-bold mb-4">Flags Emojis</h2>
       Copied to clipboard!
     </div>
 
-    <script src="assets/script.j" />
+    <script src="assets/script.js" />
   </body>
 </html>