Update README.md

Author: SreemonPremkumarM

README.md

@@ -1,6 +1,6 @@
 # WPF GridControl ToolTip
 
-This repository contains the sample which shows add or remove the tooltip to a specific cell or row or column in [WPF GridControl](https://help.syncfusion.com/wpf/gridcontrol/overview).
+This repository contains the sample which shows add or remove the tooltip to a specific cell or row or column in [WPF GridControl](https://www.syncfusion.com/wpf-controls/excel-like-grid).
 
 ### ToolTip for row and column
 
@@ -145,4 +145,4 @@ The `ResetValue` method is used to remove the ToolTip for any cell or row or col
 
 ``` csharp
 gridcontrol.Model[1, 1].ResetValue(GridStyleInfoStore.ToolTipProperty);
-```
+```