ci: fix style

Author: long2ice

examples/main.py

@@ -1,11 +1,13 @@
+from contextlib import asynccontextmanager
+
 import redis.asyncio as redis
 import uvicorn
-from contextlib import asynccontextmanager
 from fastapi import Depends, FastAPI, HTTPException, WebSocket
 
 from fastapi_limiter import FastAPILimiter
 from fastapi_limiter.depends import RateLimiter, WebSocketRateLimiter
 
+
 @asynccontextmanager
 async def lifespan(_: FastAPI):
     redis_connection = redis.from_url("redis://localhost:6379", encoding="utf8")