fix typeid

#12 (comment)

Author: huihut

README.md

@@ -1173,7 +1173,7 @@ catch (bad_cast b) {
 #### typeid
 
 * typeid 运算符允许在运行时确定对象的类型
-* type\_id 返回一个 type\_info 对象的引用
+* typeid 返回一个 type\_info 对象的引用
 * 如果想通过基类的指针获得派生类的数据类型，基类必须带有虚函数
 * 只能获取对象的实际类型
 

README_en.md

@@ -1180,7 +1180,7 @@ catch (bad_cast b) {
 #### typeid
 
 * The typeid operator allows determining the type of an object at runtime
-* type \ _id returns a reference to a type \ _info object
+* typeid returns a reference to a type\_info object
 * If you want to get the data type of the derived class through the pointer of the base class, the base class must have a virtual function
 * Can only get the actual type of the object