[fix-#11830]fix doc about sub-process's child node describe (#11837)

* [fix-#11830]fix doc

* Update docs/docs/en/guide/task/sub-process.md

docs/docs/en/guide/task/sub-process.md

@@ -36,7 +36,7 @@ Create a shell task to print "hello" and define the workflow as `test_dag01`.
 
 ## Create the Sub_process task
 
-To use the sub_process, you need to create the sub-node task, which is the shell task we created in the first step. After that, as shown in the diagram below, select the corresponding sub-node in position ⑤.
+To use the sub_process, you need to create the sub-node task, which is the workflow `test_dag01` we created in the first step. After that, as shown in the diagram below, select the corresponding sub-node in position ⑤.
 
 ![subprocess_task02](../../../../img/tasks/demo/subprocess_task02.png)
 

docs/docs/zh/guide/task/sub-process.md

@@ -34,7 +34,7 @@
 
 ### 创建 sub_process 任务
 
-在使用 sub_process 的过程中，需要创建所需的子结点任务，也就是我们第一步所创建的 shell 任务。然后如下图所示，在 ⑤ 的位置选择对应的子结点即可。
+在使用 sub_process 的过程中，需要创建所需的子结点任务，也就是我们第一步所创建的 test_dag01 工作流。然后如下图所示，在 ⑤ 的位置选择对应的子结点即可。
 
 ![subprocess_task02](../../../../img/tasks/demo/subprocess_task02.png)