[fix] py sagemaker doc (#11109)

docs/configs/docsdev.js

@@ -607,7 +607,7 @@ export default {
                             },
                             {
                                 title: 'SageMaker',
-                                link: '/zh-cn/docs/dev/user_doc/guide/task/SageMaker.html',
+                                link: '/zh-cn/docs/dev/user_doc/guide/task/sagemaker.html',
                             },
                         ],
                     },

dolphinscheduler-python/pydolphinscheduler/docs/source/tasks/sagemaker.rst

@@ -19,7 +19,7 @@ SageMaker
 =========
 
 
-A shell task type's example and dive into information of **PyDolphinScheduler**.
+A SageMaker task type's example and dive into information of **PyDolphinScheduler**.
 
 Example
 -------