Readme: fix composer link (#103)

Author: RiKap

README.md

@@ -20,7 +20,7 @@ Website 🚀 <a href="https://contributte.org">contributte.org</a> | Contact 
 
 ## Usage
 
-To install the latest version of `nettrine/orm` use [Composer](https://getcomposer.com).
+To install the latest version of `nettrine/orm` use [Composer](https://getcomposer.org).
 
 ```
 composer require nettrine/orm