[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

cibuildwheel/docker_container.py

@@ -9,6 +9,7 @@
 from pathlib import Path, PurePath
 from types import TracebackType
 from typing import IO, Dict, List, Optional, Sequence, Type, cast
+
 from cibuildwheel.util import CIProvider, detect_ci_provider
 
 from .typing import PathOrStr, PopenBytes