Update enum.rst: Adding choice_label

Page: https://symfony.com/doc/5.x/reference/forms/types/enum.html

Author: ThomasLandauer

reference/forms/types/enum.rst

@@ -83,6 +83,8 @@ Inherited Options
 
 These options inherit from the :doc:`ChoiceType </reference/forms/types/choice>`:
 
+.. include:: /reference/forms/types/options/choice_label.rst.inc
+
 .. include:: /reference/forms/types/options/error_bubbling.rst.inc
 
 .. include:: /reference/forms/types/options/error_mapping.rst.inc