specify upper bound for __class_getitem__

Author: nachomaiz

buildconfig/stubs/pygame/sprite.pyi

@@ -158,7 +158,7 @@ _TDirtySprite = TypeVar("_TDirtySprite", bound=_DirtySpriteSupportsGroup)
 class AbstractGroup(Generic[_TSprite]):
     spritedict: dict[_TSprite, Optional[Union[FRect, Rect]]]
     lostsprites: list[Union[FRect, Rect]]
-    def __class_getitem__(cls, item: Any, /) -> types.GenericAlias: ...
+    def __class_getitem__(cls, item: type[_SupportsSpriteGroup], /) -> types.GenericAlias: ...
     def __init__(self) -> None: ...
     def __len__(self) -> int: ...
     def __iter__(self) -> Iterator[_TSprite]: ...