Update README.md

Author: SamyPesse

README.md

@@ -3,7 +3,7 @@ Learn Javascript
 
 This book will teach you the basics of programming and Javascript. Whether you are an experienced programmer or not, this book is intended for everyone who wishes to learn the JavaScript programming language.
 
-This book has been generated using [GitBook](http://www.gitbook.com) and is open source, feel free to contribute or signal issues on [GitHub](https://github.com/GitbookIO/javascript). You can download a **PDF** or **ePUB** version at [https://www.gitbook.com/book/GitBookIO/javascript](https://www.gitbook.com/book/GitBookIO/javascript).
+This book has been generated using [GitBook](https://www.gitbook.com) and is open source, feel free to contribute or signal issues on [GitHub](https://github.com/GitbookIO/javascript). You can download a **PDF** or **ePUB** version at [https://www.gitbook.com/book/GitBookIO/javascript](https://www.gitbook.com/book/GitBookIO/javascript).
 
 ![Screen](./en/assets/intro.png)