chore(client): use anyio.sleep instead of asyncio.sleep (#1198)

Author: stainless-bot

src/openai/_resource.py

@@ -3,9 +3,10 @@
 from __future__ import annotations
 
 import time
-import asyncio
 from typing import TYPE_CHECKING
 
+import anyio
+
 if TYPE_CHECKING:
     from ._client import OpenAI, AsyncOpenAI
 
@@ -39,4 +40,4 @@ def __init__(self, client: AsyncOpenAI) -> None:
         self._get_api_list = client.get_api_list
 
     async def _sleep(self, seconds: float) -> None:
-        await asyncio.sleep(seconds)
+        await anyio.sleep(seconds)