Update README.md

Author: madeindjs

README.md

@@ -1,5 +1,5 @@
 <h1 align="center">
-  <img src="img/logo.svg" alt="Api on Rails 5" />
+  <img src="fr/img/logo.svg" alt="Api on Rails 5" />
 </h1>
 
 Learn **best practices** to build an **API** using **Ruby on Rails** 5. The intention with this book it’s not only to teach you how to build an API with Rails. The purpose is also to teach you how to build **scalable** and **maintainable** API with Rails which means **improve** your current Rails knowledge. In this book you will learn to: