Update README.md

Author: syncsiva

README.md

@@ -5,6 +5,6 @@ In this way, datagrid provides the same loading time for 1K records and 1 millio
 
 In addition to that datagrid provides option to show built-in busy indicator for long running operations by setting [ShowbusyIndicator](https://help.syncfusion.com/cr/cref_files/wpf/Syncfusion.SfGrid.WPF~Syncfusion.UI.Xaml.Grid.SfDataGrid~ShowBusyIndicator.html) as `true` to enhance the user experience.
 
-Reference
+<b>Reference</b>
 
 [WPF DataGrid Performance](https://help.syncfusion.com/wpf/sfdatagrid/performance)