📝 Update sort path delegate description

Author: AlexV525

README-ZH.md

@@ -270,11 +270,12 @@ FAILURE: Build failed with an exception.
 但是 `AssetPathEntity` 的名字或属性只能通过 `SortPathDelegate` 进行更改。
 这是你能访问到所有 `AssetPathEntity` 的唯一方法，或者说，是现阶段我们暴露出来的唯一方法。
 
-若需要更改某一个路径的名字，继承 `SortPathDelegate` 并实现你自己的构建，接着像如下代码一样进行编写：
+若需要更改某一个路径的名字，继承 `CommonSortPathDelegate` 并实现你自己的构建，
+接着像如下代码一样进行编写：
 
 ```dart
 /// 构建你自己的排序
-class CustomSortPathDelegate extends SortPathDelegate {
+class CustomSortPathDelegate extends CommonSortPathDelegate {
   const CustomSortPathDelegate();
 
   @override

README.md

@@ -265,14 +265,15 @@ includes all `AssetEntity` on your device.
 "Recent" is a system named entity in most platforms.
 While we provided ability to customize the text delegate,
 the name/properties can only be updated with `SortPathDelegate`.
-This is the only way that you have access to all path entities, or the only way that we exposed currently.
+This is the only way that you have access to all path entities,
+or the only way that we exposed currently.
 
-To change the name of the path entity, extend the `SortPathDelegate` with your own delegate,
+To change the name of the path entity, extend the `CommonSortPathDelegate` with your own delegate,
 then write something like the code below:
 
 ```dart
 /// Create your own sort path delegate.
-class CustomSortPathDelegate extends SortPathDelegate {
+class CustomSortPathDelegate extends CommonSortPathDelegate {
   const CustomSortPathDelegate();
 
   @override