updated docs

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

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

 # Image Processing
 
 > **NOTE**
-> The initial APIs of this module are supported since API 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+> The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
 ## Modules to Import