Update Readme.md

Author: anshooarora

Readme.md

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 ### Documentation ###
 
-* Documentation (still in progress) for ExtentReports 5.x is hosted on GitHub at [ExtentReports Wiki](https://github.com/extent-framework/extentreports-java/wiki). 
-* For versions 4 and below, visit [extentreports.com](http://extentreports.com/).
+Documentation for ExtentReports 5.x and lower versions is hosted on [ExtentReports.com](http://extentreports.com)
 
 ### Samples ###