fix: literal dependency

Author: 潘婉宁

volcenginesdkarkruntime/types/context/context_chat_completion.py

@@ -1,4 +1,5 @@
-from typing import List, Optional, Literal
+from typing import List, Optional
+from typing_extensions import Literal
 
 from ..._models import BaseModel
 from ..chat.chat_completion import Choice

volcenginesdkarkruntime/types/context/context_chat_completion_chunk.py

@@ -1,4 +1,5 @@
-from typing import List, Optional, Literal
+from typing import List, Optional
+from typing_extensions import Literal
 
 from ..._models import BaseModel
 from ..chat.chat_completion_chunk import Choice

volcenginesdkarkruntime/types/context/truncation_strategy.py

@@ -1,7 +1,7 @@
 from typing import Optional
+from typing_extensions import Literal
 
 from ..._models import BaseModel
-from typing_extensions import Literal
 
 __all__ = ["TruncationStrategy"]