fix: stop generate api doc error (#2262)

web/app/components/develop/template/template_chat.en.mdx

@@ -339,7 +339,7 @@ Chat applications support session persistence, allowing previous chat history to
   ### Request Body
   - `user` (string) Required
     User identifier, used to define the identity of the end-user, must be consistent with the user passed in the send message interface.
-  Response
+  ### Response
   - `result` (string) Always returns "success"
   </Col>
   <Col sticky>