Fix the bug in create_dataset function (#4284)

### What problem does this PR solve?

Fix the bug in create_dataset function #4136

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>

docs/references/python_api_reference.md

@@ -28,7 +28,7 @@ RAGFlow.create_dataset(
     name: str,
     avatar: str = "",
     description: str = "",
-    embedding_model: str = "BAAI/bge-zh-v1.5",
+    embedding_model: str = "BAAI/bge-large-zh-v1.5",
     language: str = "English",
     permission: str = "me", 
     chunk_method: str = "naive",

sdk/python/ragflow_sdk/ragflow.py

@@ -46,13 +46,15 @@ class RAGFlow:
         res = requests.put(url=self.api_url + path, json= json,headers=self.authorization_header)
         return res
 
-    def create_dataset(self, name: str, avatar: str = "", description: str = "", language: str = "English",
+    def create_dataset(self, name: str, avatar: str = "", description: str = "", embedding_model:str = "BAAI/bge-large-zh-v1.5",
+                       language: str = "English",
                        permission: str = "me",chunk_method: str = "naive",
                        parser_config: DataSet.ParserConfig = None) -> DataSet:
         if parser_config:
             parser_config = parser_config.to_json()
         res = self.post("/datasets",
-                        {"name": name, "avatar": avatar, "description": description, "language": language,
+                        {"name": name, "avatar": avatar, "description": description,"embedding_model":embedding_model,
+                         "language": language,
                          "permission": permission, "chunk_method": chunk_method,
                          "parser_config": parser_config
                          }