更新导读

Signed-off-by: Nningning <wangningning14@huawei.com>

zh-cn/application-dev/application-dev-guide.md

@@ -37,7 +37,7 @@
 - [电话服务](telephony/telephony-overview.md)
 - [数据管理](database/data-mgmt-overview.md)
 - [文件管理](file-management/file-management-overview.md)
-- [任务管理](task-management/background-task-overview.md)
+- [后台任务（Background Task）管理](task-management/background-task-overview.md)
 - [设备管理](device/usb-overview.md)
 - [设备使用信息统计](device-usage-statistics/device-usage-statistics-overview.md)
 - [DFX](dfx/hiappevent-guidelines.md)