Type alias fix

Signed-off-by: Eric Kerfoot <17726042+ericspod@users.noreply.github.com>

Author: ericspod

monai/transforms/croppad/dictionary.py

@@ -19,7 +19,7 @@
 
 from collections.abc import Callable, Hashable, Mapping, Sequence
 from copy import deepcopy
-from typing import Any, Optional, cast
+from typing import Any, TypeAlias, cast
 
 import numpy as np
 import torch
@@ -486,7 +486,7 @@ def __init__(
         self._has_str_roi = any(isinstance(v, str) for v in [roi_center, roi_size, roi_start, roi_end])
 
         if not self._has_str_roi:
-            _roi_t = Optional[Sequence[int] | int]
+            _roi_t: TypeAlias = Sequence[int] | int | None
             cropper = SpatialCrop(
                 cast(_roi_t, roi_center),
                 cast(_roi_t, roi_size),