Update README.md

grammatical changes in readme file committed.

Author: UmaMaheswariChandrabose

README.md

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 # How to Customize the Columns of ASP.NET Core DataGrid Using Templates
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 A quick-start project that helps you to customize columns in the Syncfusion ASP.NET Core DataGrid using templates. Explore how to use conditional templates to include columns with checkboxes.
 
-## Documentations: 
+## Documentation: 
 * Column Template: https://ej2.syncfusion.com/aspnetcore/documentation/grid/columns/column-template 
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 * Header template: https://ej2.syncfusion.com/aspnetcore/documentation/grid/columns/headers#header-template 
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 * Condition template: https://ej2.syncfusion.com/aspnetcore/documentation/grid/columns/column-template#using-condition-template 
 
-## Demos:
+## Examples:
 * Column Template: https://ej2.syncfusion.com/aspnetcore/Grid/ColumnTemplate#/fluent 
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 * Header Template: https://ej2.syncfusion.com/aspnetcore/Grid/HeaderTemplate#/fluent
 
-## Project pre-requisites 
+## Project prerequisites 
 Make sure you have compatible versions of the following IDE and framework installed on your machine before starting this project:
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 * .NET SDK 6.0 ([.NET ](https://dotnet.microsoft.com/en-us/download))
 * Visual Studio 2022 ([Visual studio](https://visualstudio.microsoft.com/downloads/)) or later
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 ---
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 To learn more about the supported IDE and frameworks for our ASP.NET Core controls, please refer to the documentation below: 
 https://ej2.syncfusion.com/aspnetcore/documentation/system-requirements
 
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 ## How to run this application:
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 To run this application, clone the `how-to-customize-the-columns-of-aspdotnet-core-datagrid-using-templates` repository and open it in Visual Studio. Install the necessary NuGet packages via the package manager, then build and run the project by pressing the F5 key.