Update app.py

app.py

@@ -314,7 +314,7 @@ School of Computer Science, UPES, Dehradun, India
             ## Click on that tab
             js = f"""
             <script>
-                var tab = window.parent.document.getElementById('tabs-bui1-tab-{index_tab}');
+                var tab = window.parent.document.getElementById('{index_tab}');
                 tab.click();
             </script>
             """