update docs

Signed-off-by: Nzengyawen <zengyawen1@huawei.com>

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

-> ![icon-note.gif](public_sys-resources/icon-note.gif) **说明：**
+> ![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.
 > 
 > The Bluetooth module provides Classic Bluetooth capabilities and Bluetooth Low Energy (BLE) scan and advertising.