Update README.md

Author: GnanaPriyaNamasivayam

README.md

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 This example demonstrates how to notify item selection using MVVM in Xamarin.Forms listview.
 
+See [How to notify item selection using MVVM in Xamarin.Forms ListView](https://www.syncfusion.com/kb/9961/how-to-notify-item-selection-using-mvvm-in-xamarin-forms-listview) for more details.
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 ## Requirements to run the demo
 
 * [Visual Studio 2017](https://visualstudio.microsoft.com/downloads/) or [Visual Studio for Mac](https://visualstudio.microsoft.com/vs/mac/)