!14508 【轻量级 PR】：update zh-cn/application-dev/reference/apis/Readme-CN.md.

Merge pull request !14508 from 葛亚芳/N/A

zh-cn/application-dev/reference/apis/Readme-CN.md

@@ -113,6 +113,7 @@
       - [ServiceExtensionContext](js-apis-inner-application-serviceExtensionContext.md)
       - [UIAbilityContext](js-apis-inner-application-uiAbilityContext.md)
       - [shellCmdResult](js-apis-inner-application-shellCmdResult.md)
+      - [WindowExtensionContext](js-apis-inner-application-windowExtensionContext.md)
     - wantAgent
       - [triggerInfo](js-apis-inner-wantAgent-triggerInfo.md)
       - [wantAgentInfo](js-apis-inner-wantAgent-wantAgentInfo.md)