Update README.md

Author: hantsy

README.md

@@ -3,7 +3,7 @@ angularjs-springmvc-sample-boot
 
 An example application using AnguarJS/Bootstrap as frontend and Spring MVC as REST API producer.
 
-**More details about the codes, please read the online GitBook: [Building REST APIs with Spring MVC](https://hantsy.gitbooks.io/build-a-restful-app-with-spring-mvc-and-angularjs/content/).**
+**More details about the codes, please read the online GitBook: [Building REST APIs with Spring MVC](https://www.gitbook.com/book/hantsy/build-a-restful-app-with-spring-mvc-and-angularjs/details).**
 
 This version improved the original version, including: