Add book zh Dive Into Design Patterns (#6711)

* Add book zh Dive Into Design Patterns

* Fix Alphabetical ordering

* Fix Alphabetical ordering again

books/free-programming-books-zh.md

@@ -208,6 +208,7 @@
 
 ### 设计模式
 
+* [深入设计模式](https://refactoringguru.cn/design-patterns)
 * [史上最全设计模式导学目录](http://blog.csdn.net/lovelion/article/details/17517213)
 * [图说设计模式](https://github.com/me115/design_patterns)