Add doc (13539)

Signed-off-by: Nester.zhou <ester.zhou@huawei.com>

en/release-notes/changelogs/OpenHarmony_4.0.2.2/changelog-web.md

+# Web Subsystem ChangeLog
+
+Compared with earlier versions, OpenHarmony 4.0.2.2 has the following API changes in its web subsystem:
+
+## cl.web.1 Removal of webDebuggingAccess
+
+The definition of the **webDebuggingAccess** API is inappropriate. This API should take effect for all **Web** instances. In light of this, it is removed and replaced by the new API **setWebDebuggingAccess**.
+
+**Change Impacts**
+
+This API must be deprecated and replaced with the **setWebDebuggingAccess** API.
+
+**Key API/Component Changes**
+
+| Class| API Type| Declaration| Change Type|
+|  -- | -- | -- | -- |
+|WebAttribute | method | webDebugggingAccess(webDebugggingAccess: boolean): WebAttribute| Deleted |
+
+**Adaptation Guide**
+
+Use the new API **setWebDebuggingAccess**.
+
+## cl.web.2 Adding of setWebDebuggingAccess
+
+The static API **setWebDebuggingAccess** is added to **WebviewController**. It sets whether to enable web debugging, and the setting takes effect for all **Web** instances.
+
+**Change Impacts**
+
+The original **webDebugggingAccess** API must be replaced with the new API in the application.
+
+**Key API/Component Changes**
+
+| Class| API Type| Declaration| Change Type|
+|  -- | -- | -- | -- |
+|webview.WebviewController | method | static setWebDebugggingAccess(webDebugggingAccess: boolean): void| Added|
+
+**Adaptation Guide**
+
+The following exemplifies how to enable web debugging:
+
+```ts
+// xxx.ets
+import web_webview from '@ohos.web.webview';
+
+@Entry
+@Component
+struct WebComponent {
+  controller: web_webview.WebviewController = new web_webview.WebviewController();
+
+  aboutToAppear():void {
+    try {
+      web_webview.WebviewController.setWebDebuggingAccess(true);
+    } catch(error) {
+      console.error(`ErrorCode: ${error.code},  Message: ${error.message}`);
+    }
+  }
+
+  build() {
+    Column() {
+      Web({ src: 'www.example.com', controller: this.controller })
+    }
+  }
+}
+
+```
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