fix(apis_relations): fix follow of property reveversion registration

The Property model does not inherity from vocabsbaseclass but from
rootobject, therefore the reversion should follow that foreignkey.

apis_core/apis_relations/models.py

@@ -49,7 +49,7 @@ def filter_for_user(self):
  return self.get_queryset()
 
 
-@reversion.register(follow=["vocabsbaseclass_ptr"])
+@reversion.register(follow=["rootobject_ptr"])
 class Property(RootObject):
  class Meta:
  verbose_name_plural = "Properties"