Change the type alias from a class to a real rename (#5258)

Author: HenningCode

sdk/python/packages/flet/src/flet/core/dropdown.py

@@ -151,10 +151,9 @@ def trailing_icon(self, value: Optional[IconValueOrControl]):
             self._set_enum_attr("trailingIcon", value, IconEnums)
 
 
-class DropdownOption(Option):
-    """Alias for Option"""
-
-
+DropdownOption = Option
+    
+    
 class Dropdown(FormFieldControl):
     """
     A dropdown control that allows users to select a single option from a list of options.