Fix gif image reference path

radgrid-excel-like-demo.md

@@ -5,4 +5,4 @@
 - Add RadGrid markup pre-configured for Excel-Like filtering to the page by using the `gridexcel` snippet for HTML
 - In the code behind, generate the necessary methods required for RadGrid Excel-Like Filtering functionality using the `gridexcel` snippet for C#/VB. (it generates the NeedDataSource and FilterCheckListItemsRequested event handlers as well a DataTable data source with dummy data)
 
-![RadGrid Excel-Like Filtering Demo](Images\RadGrid_Excel_Like_Filtering_Demo.gif)
+![RadGrid Excel-Like Filtering Demo](Images/RadGrid_Excel_Like_Filtering_Demo.gif)