Update flutter-toc.html

Author: LavanyaA

flutter-toc.html

@@ -3,7 +3,7 @@
      <li>
         <a href="/Flutter/introduction/api-reference">API Reference</a>
 		<ul>
-		<li><a href="https://pub.dev/documentation/syncfusion_flutter_barcodes/latest/barcodes/barcodes-library.hthow toml">Barcode Generator</a></li>
+		<li><a href="https://pub.dev/documentation/syncfusion_flutter_barcodes/latest/barcodes/barcodes-library.html">Barcode Generator</a></li>
 		<li><a href="https://pub.dev/documentation/syncfusion_flutter_calendar/latest/calendar/calendar-library.html">Calendar</a></li>
         <li><a href="https://pub.dev/documentation/syncfusion_flutter_charts/latest/charts/charts-library.html">Charts</a></li>
         <li><a href="https://pub.dev/documentation/syncfusion_flutter_datagrid/latest/datagrid/datagrid-library.html">DataGrid</a></li>