Add aibydoing.com to free-courses-zh.md (#11523)

* Add "动手实战人工智能" course in Chinese

* Add "动手实战人工智能" course in Chinese

* add blank lines

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Co-authored-by: huhuhang <[email protected]>

Author: huhuhang

Diff for: books/free-programming-books-zh.md

@@ -12,6 +12,7 @@
     * [函数式概念](#函数式概念)
     * [计算机图形学](#计算机图形学)
     * [其它](#其它)
+    * [人工智能](#人工智能)
     * [软件开发方法](#软件开发方法)
     * [设计模式](#设计模式)
     * [数据库](#数据库)
@@ -186,6 +187,11 @@
 * [Sketch 中文手册](http://sketchcn.com/sketch-chinese-user-manual.html#introduce)
 
 
+### 人工智能
+
+* [动手实战人工智能](https://aibydoing.com) - huhuhang
+
+
 ### 软件开发方法
 
 * [傻瓜函数编程](https://github.com/justinyhuang/Functional-Programming-For-The-Rest-of-Us-Cn) (《Functional Programming For The Rest of Us》中文版)