!2053 【轻量级 PR】：update zh-cn/application-dev/ability/Readme-CN.md.

Merge pull request !2053 from 孙悦/N/A

zh-cn/application-dev/ability/Readme-CN.md

-# Ability框架
-
-[Ability框架概述](ability-brief.md)
-
-### FA模型
-
-* [FA模型综述](fa-brief.md)
-* [PageAbility开发指导](fa-pageability.md)
-* [ServiceAbility开发指导](fa-serviceability.md)
-* [DataAbility开发指导](fa-dataability.md)
-* [FormAbility开发指导](fa-formability.md)
-
-### Stage模型
-
-* [Stage模型综述](stage-brief.md)
-* [Ability开发指导](stage-ability.md)
-* [ServiceExtensionAbility开发指导](stage-serviceextension.md)
-* [FormExtensionAbility开发指导](stage-formextension.md)
-* [应用迁移开发指导](stage-ability-continuation.md)
-
-### 其他
-
-* [WantAgent使用指导](wantagent.md)
-* [Ability助手使用指导](ability-assistant-guidelines.md)
\ No newline at end of file
+# Ability开发
+ - [Ability框架概述](ability-brief.md)
+ - FA模型    
+   - [FA模型综述](fa-brief.md)
+   - [PageAbility开发指导](fa-pageability.md)
+   - [ServiceAbility开发指导](fa-serviceability.md)
+   - [DataAbility开发指导](fa-dataability.md)
+   - [FormAbility开发指导](fa-formability.md)
+ - Stage模型
+   - [Stage模型综述](stage-brief.md)
+   - [Ability开发指导](stage-ability.md)
+   - [ServiceExtensionAbility开发指导](stage-serviceextension.md)
+   - [FormExtensionAbility开发指导](stage-formextension.md)
+   - [应用迁移开发指导](stage-ability-continuation.md)
+ - 其他
+   - [WantAgent使用指导](wantagent.md)
+   - [Ability助手使用指导](ability-assistant-guidelines.md)
\ No newline at end of file