feat(ark e2e): fix lint

Change-Id: Ifd2f682815ebbe9e5b16dc9e78a949f3d9c050a0

Author: liuhuiqi.7

volcenginesdkarkruntime/resources/chat/completions.py

@@ -203,7 +203,7 @@ async def _decrypt_chunk(self, key: bytes, nonce: bytes, resp: AsyncStream[ChatC
             yield chunk
 
     async def _decrypt(self, key: bytes, nonce: bytes, resp: ChatCompletion | AsyncStream[ChatCompletionChunk]
-                 ) -> ChatCompletion | AsyncStream[ChatCompletionChunk]:
+                       ) -> ChatCompletion | AsyncStream[ChatCompletionChunk]:
         if isinstance(resp, ChatCompletion):
             if resp.choices is not None:
                 choice = resp.choices[0]