Format files by pre-commit run -a

Signed-off-by: Yu Ishikawa <yu-iskw@users.noreply.github.com>

pr_agent/servers/github_polling.py

@@ -1,11 +1,12 @@
 import asyncio
 import multiprocessing
-from collections import deque
-import traceback
-from datetime import datetime, timezone
 import time
-import requests
+import traceback
+from collections import deque
+from datetime import datetime, timezone
+
 import aiohttp
+import requests
 
 from pr_agent.agent.pr_agent import PRAgent
 from pr_agent.config_loader import get_settings