update docs against 6923

Signed-off-by: Nwusongqing <wusongqing@huawei.com>

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

 # XML-to-JavaScript Conversion
 
-> **NOTE**<br/>
+The **convertxml** module provides APIs for converting XML text into JavaScript objects.
+
+> **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.