update docs

Signed-off-by: Nshawn_he <shawn.he@huawei.com>

en/application-dev/internationalization/intl-guidelines.md

@@ -292,7 +292,7 @@ Use [RelativeTimeFormat](../reference/apis/js-apis-intl.md) APIs to format the r
    Alternatively, use your own locale and formatting parameters to create a **RelativeTimeFormat** object. Formatting parameters are optional. For a full list of formatting parameters, see [ RelativeTimeFormatInputOptions](../reference/apis/js-apis-intl.md).
    
    ```
-   var relativeTimeFormat = new intl.RelativeTimeFormat("zh-CN", {numeric: "always", style: "long"};
+   var relativeTimeFormat = new intl.RelativeTimeFormat("zh-CN", {numeric: "always", style: "long"});
    ```
 
 2. Format the relative time.<br>

en/application-dev/reference/apis/js-apis-usb.md

 # USB
 
-> **NOTE**<br>
+This module provides USB device management functions, including USB device list query, bulk data transfer, control transfer, and permission control.
+
+> **NOTE**
+> 
 > The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
 ## Modules to Import