Update README.md

Author: abooarulraj

README.md

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 A quick-start project that helps you create the Blazor TreeGrid of Syncfusion in a Blazor server application. This sample explains how to add columns and show parent-child flat data using the expand and collapse options. You can also learn how to add useful features to the TreeGrid: paging, sorting, and filtering.
 
-Watch the video now:https://www.syncfusion.com/tutorial-videos/blazor/tree-grid?title=create-a-tree-grid-in-blazor-server-application-in-10
+Watch the video now: https://www.syncfusion.com/tutorial-videos/blazor/tree-grid?title=create-a-tree-grid-in-blazor-server-application-in-10
 
 Documentation: https://blazor.syncfusion.com/documentation/treegrid/getting-started