修改示例

Signed-off-by: N@shi-xiaoxiao-iris <shixiaoxiao2@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-device-manager.md

@@ -837,7 +837,8 @@ setUserOperation(operateAction: number, params: string): void;
       operateAction = 4 - 取消pin码输入框展示
       operateAction = 5 - pin码输入框确定操作
     */
-    dmClass.setUserOperation(operation, "extra")
+    let operation = 0;
+    this.dmInstance.setUserOperation(operation, "extra")
     } catch (err) {
       console.error("setUserOperation errCode:" + err.code + ",errMessage:" + err.message);
   }