Update Readme.md

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Readme.md

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 ## Extent Framework 4 - Community Edition
 
 [![Join the chat at https://gitter.im/anshooarora/extentreports-csharp](https://badges.gitter.im/anshooarora/extentreports-csharp.svg)](https://gitter.im/anshooarora/extentreports-csharp?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/8d4e66d07b9e4ebca7cef7c5b5eb7ba2)](https://www.codacy.com/app/anshooarora/extentreports-csharp?utm_source=github.com&utm_medium=referral&utm_content=extent-framework/extentreports-csharp&utm_campaign=Badge_Grade)
 ![](https://img.shields.io/github/license/extent-framework/extentreports-csharp.svg?style=plastic)
 
 .NET Framework 4.5+ only