update docs

Signed-off-by: Nannie_wangli <annie.wangli@huawei.com>

en/application-dev/reference/apis/js-apis-storage-statistics.md

 # App Storage Statistics
 
 > ![icon-note.gif](public_sys-resources/icon-note.gif) **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

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

 # Volume Management
 
 > ![icon-note.gif](public_sys-resources/icon-note.gif) **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