doc: Correct support version between pydolphinscheduler and dolphinscheduler (#92)

diff --git a/RELEASE.md b/RELEASE.md
index 27d3dc5..a1695d5 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -24,7 +24,7 @@
 
 ## Prepare
 
-* Change `version_ext` about the dolphinscheduler version current support, the syntax is respect [pep-044](https://peps.python.org/pep-0440/#version-specifiers)
+* Change `version_ext` about the dolphinscheduler version current support, the syntax is respect [pep-044](https://peps.python.org/pep-0440/#version-specifiers), and update support version in `docs/source/index.rst` file.
 * Cherry-pick some backward compatibility commit in [4.0.x](https://github.com/apache/dolphinscheduler-sdk-python/tree/4.0.x), the first
   commit is 3a8a4e31
 * Revert commit Apache dolphinscheduler not release yet, see [this link](https://github.com/apache/dolphinscheduler-sdk-python/pulls?q=is%3Apr+is%3Aclosed+label%3Adep-main-repo)
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 89611e3..330b4e6 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -84,7 +84,9 @@
 +-----------------------------+----------------------------+---------------------+
 | above 3.1.0 and prior 3.1.2 | 3.1.0                      | before we seperated |
 +-----------------------------+----------------------------+---------------------+
-| above 3.1.2 and prior 3.1.4 | 4.0.0                      |                     |
+| above 3.1.2 and prior 3.1.4 | >=4.0.0, <4.0.3            |                     |
++-----------------------------+----------------------------+---------------------+
+| 3.1.5                       | 4.0.3                      |                     |
 +-----------------------------+----------------------------+---------------------+