Update README.md

Author: maskleo

README.md

@@ -12,13 +12,13 @@
 
 * [前言](https://github.com/zerotoneorg/Java-Generics-and-Collections/tree/e41f1e9a8eb376f2de33abd6022ce3b2989ba771/Preface.md)
 * [第一部分：泛型](di-yi-bu-fen-fan-xing/)
-  * \[第一章\(简介\)\]\(ch01/00\_Introduction.md\#第一章\(简介\)\)
+  * [第一章\(简介\)](ch01/00\_Introduction.md\#第一章\(简介\))
     * [1.1 泛型](https://github.com/zerotoneorg/Java-Generics-and-Collections/tree/e41f1e9a8eb376f2de33abd6022ce3b2989ba771/ch01/01_Generics.md#泛型)
     * [1.2 装箱与拆箱](https://github.com/zerotoneorg/Java-Generics-and-Collections/tree/e41f1e9a8eb376f2de33abd6022ce3b2989ba771/ch01/02_Boxing_and_Unboxing.md#装箱与拆箱)
     * [1.3 循环](https://github.com/zerotoneorg/Java-Generics-and-Collections/tree/e41f1e9a8eb376f2de33abd6022ce3b2989ba771/ch01/03_Foreach.md#循环)
     * [1.4 泛型方法和可变参数](https://github.com/zerotoneorg/Java-Generics-and-Collections/tree/e41f1e9a8eb376f2de33abd6022ce3b2989ba771/ch01/04_Generic_Methods_and_Varargs.md#泛型方法和可变参数)
     * [1.5 断言](https://github.com/zerotoneorg/Java-Generics-and-Collections/tree/e41f1e9a8eb376f2de33abd6022ce3b2989ba771/ch01/05_Assertions.md#断言)
-  * \[第二章\(子类型化和通配符\)\]\(ch02/00\_Subtyping\_and\_Wildcards.md\#第二章\(子类型化和通配符\)\)
+  * [第二章\(子类型化和通配符\)](ch02/00\_Subtyping\_and\_Wildcards.md\#第二章\(子类型化和通配符\))
     * [2.1 子类型化和替代原则](https://github.com/zerotoneorg/Java-Generics-and-Collections/tree/e41f1e9a8eb376f2de33abd6022ce3b2989ba771/ch02/01_Subtyping_and_the_Substitution_Principle.md#子类型化和替代原则)
     * [2.2 通配符和继承](https://github.com/zerotoneorg/Java-Generics-and-Collections/tree/e41f1e9a8eb376f2de33abd6022ce3b2989ba771/ch02/02_Wildcards_with_extends.md#通配符和继承)
     * [2.3 通配符和超类](https://github.com/zerotoneorg/Java-Generics-and-Collections/tree/e41f1e9a8eb376f2de33abd6022ce3b2989ba771/ch02/03_Wildcards_with_super.md#通配符和超类)