导入模块规范化

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

zh-cn/application-dev/reference/apis/js-apis-WorkSchedulerExtensionAbility.md

@@ -12,7 +12,6 @@
 
 ```ts
 import WorkSchedulerExtensionAbility from '@ohos.WorkSchedulerExtensionAbility';
-import workScheduler from '@ohos.resourceschedule.workScheduler';
 ```
 
 ## 属性
@@ -40,6 +39,8 @@ onWorkStart(work: workScheduler.WorkInfo): void
 **示例：** 
 
   ```ts
+  import workScheduler from '@ohos.resourceschedule.workScheduler';
+
   export default class MyWorkSchedulerExtensionAbility extends WorkSchedulerExtensionAbility {
     onWorkStart(workInfo: workScheduler.WorkInfo) {
         console.log('MyWorkSchedulerExtensionAbility onWorkStart' + JSON.stringify(workInfo));
@@ -65,6 +66,8 @@ onWorkStop(work: workScheduler.WorkInfo): void
 **示例：** 
 
   ```ts
+  import workScheduler from '@ohos.resourceschedule.workScheduler';
+
   export default class MyWorkSchedulerExtensionAbility extends WorkSchedulerExtensionAbility {
     onWorkStop(workInfo: workScheduler.WorkInfo) {
         console.log('MyWorkSchedulerExtensionAbility onWorkStop' + JSON.stringify(workInfo));