Fix ruff import sort in session.py

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SteveSandersonMS

python/copilot/session.py

@@ -14,13 +14,13 @@
 from .generated.session_events import SessionEvent, SessionEventType, session_event_from_dict
 from .types import (
     MessageOptions,
-    _PermissionHandlerFn,
     SessionHooks,
     Tool,
     ToolHandler,
     UserInputHandler,
     UserInputRequest,
     UserInputResponse,
+    _PermissionHandlerFn,
 )
 from .types import (
     SessionEvent as SessionEventTypeAlias,