_arg_types.py: refine Array type alias.

PiperOrigin-RevId: 869309313

Author: schwehr

python/ee/_arg_types.py

@@ -27,8 +27,8 @@
 from ee import reducer
 
 Array = Union[
-    AnyType,
-    list[AnyType],
+    Sequence[float | ee_number.Number],
+    Sequence[Sequence[AnyType]],
     ee_array.Array,
     ee_list.List,
     computedobject.ComputedObject,