更新3.2-beta4版本API差异

Signed-off-by: Nwangqing <wangqing136@huawei.com>

zh-cn/release-notes/api-change/v3.2-beta4/Readme-CN.md

-# Readme
-
-本目录记录了OpenHarmony 3.2 Beta2版本相较于OpenHarmony 3.2 Beta1版本的API变化，包括新增、变更、废弃、删除。
-
-- JS API差异报告
-  - [元能力](js-apidiff-ability.md)
-  - [无障碍](js-apidiff-accessibility.md)
-  - [帐号](js-apidiff-account.md)
-  - [ArkUI](js-apidiff-arkui.md)
-  - [包管理](js-apidiff-bundle.md)
-  - [基础通信](js-apidiff-communicate.md)
-  - [公共基础库](js-apidiff-compiler-and-runtime.md)
-  - [DFX](js-apidiff-dfx.md)
-  - [分布式数据管理](js-apidiff-distributed-data.md)
-  - [事件通知](js-apidiff-event-and-notification.md)
-  - [文件管理](js-apidiff-file-management.md)
-  - [位置服务](js-apidiff-geolocation.md)
-  - [全球化](js-apidiff-global.md)
-  - [图形图像](js-apidiff-graphic.md)
-  - [Misc](js-apidiff-misc.md)
-  - [多模输入](js-apidiff-multi-modal-input.md)
-  - [多媒体](js-apidiff-multimedia.md)
-  - [资源调度](js-apidiff-resource-scheduler.md)
-  - [安全](js-apidiff-security.md)
-  - [泛Sensor](js-apidiff-sensor.md)
-  - [分布式软总线](js-apidiff-soft-bus.md)
-  - [测试框架](js-apidiff-unitest.md)
-  - [升级服务](js-apidiff-update.md)
-  - [USB服务](js-apidiff-usb.md)
-  - [用户身份认证](js-apidiff-user-authentication.md)
-  - [Web](js-apidiff-web.md)
-  - [窗口管理](js-apidiff-window.md)
-- 变更说明
-  - [3.2 beta2相对3.2 beta1变更详细说明](changelog-v3.2-beta2.md)
-  - [OpenHarmony启用应用沙箱机制-适配指导](application-sandbox-adaptation-guide.md)