[i18n-ignore] fix zh-cn plugin add cli usage (tauri-apps#2498)

Author: vasfvitor

src/content/docs/zh-cn/plugin/notification.mdx

@@ -22,11 +22,11 @@ import Stub from '@components/Stub.astro';
 
     使用你的项目的包管理器以添加依赖：
 
-    <CommandTabs npm="npm run tauri plugin add notification"
-    yarn="yarn run tauri plugin add notification"
-    pnpm="pnpm tauri plugin add notification"
-    bun="bun tauri plugin add notification"
-    cargo="cargo tauri plugin add notification" />
+    <CommandTabs npm="npm run tauri add notification"
+    yarn="yarn run tauri add notification"
+    pnpm="pnpm tauri add notification"
+    bun="bun tauri add notification"
+    cargo="cargo tauri add notification" />
 
     </TabItem>
     <TabItem label="手动">