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

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

src/pluggy/_callers.py

@@ -6,9 +6,9 @@
 
 from collections.abc import Generator
 from collections.abc import Mapping
+from collections.abc import Sequence
 from typing import cast
 from typing import NoReturn
-from typing import Sequence
 import warnings
 
 from ._hooks import HookImpl