isort: Add more to extra_standard_library (#9098)

stdlib/smtplib.pyi

@@ -1,4 +1,5 @@
 import sys
+from _socket import _Address as _SourceAddress
 from _typeshed import ReadableBuffer, Self, _BufferWithLen
 from collections.abc import Sequence
 from email.message import Message as _Message
@@ -9,8 +10,6 @@ from types import TracebackType
 from typing import Any, Protocol, overload
 from typing_extensions import TypeAlias
 
-from _socket import _Address as _SourceAddress
-
 __all__ = [
     "SMTPException",
     "SMTPServerDisconnected",