Rename module

Signed-off-by: Jael Gu <mengjia.gu@zilliz.com>

__init__.py

@@ -1,5 +1,5 @@
-from .openai_chat import OpenAI
+from .openai_chat import OpenaiChat
 
 
 def OpenAI(*args, **kwargs):
-    return OpenAI(*args, **kwargs)
+    return OpenaiChat(*args, **kwargs)

openai_chat.py

@@ -19,7 +19,7 @@ import openai
 from towhee.operator.base import PyOperator
 
 
-class OpenAI(PyOperator):
+class OpenaiChat(PyOperator):
     '''Wrapper of OpenAI Chat API'''
     def __init__(self,
                  model_name: str = 'gpt-3.5-turbo',