updated docs

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

en/application-dev/reference/apis/js-apis-system-app.md

 # Application Context
 
 > ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
-> - The APIs of this module are no longer maintained since API version 7. You are advised to use the new APIs
+> - The APIs of this module are no longer maintained since API version 7. You are advised to use the new APIs.
 > 
 > - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.