Update README.md

Author: magefan

README.md

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 # [Magefan](http://magefan.com/) Blog Extension for Magento 2
 
-Blog extension allows you to create a full-fledged blog on your [Magento 2](http://magento.com/) Store.
+Blog module allows you to create a full-fledged blog on your [Magento 2](http://magento.com/) Store.
 
 ## Features
   * Unlimited blog posts and categories