Fixing: imports are incorrectly sorted

Signed-off-by: Lucas Robinet <[email protected]>

Author: Lucas-rbnt

monai/networks/blocks/selfattention.py

@@ -11,7 +11,7 @@
 
 from __future__ import annotations
 
-from typing import Tuple, Union, Optional
+from typing import Optional, Tuple, Union
 
 import torch
 import torch.nn as nn