fix(Champs::Civilite): fix dsfr missing red feedback, add green feedback

app/models/champs/civilite_champ.rb

@@ -1,6 +1,10 @@
 class Champs::CiviliteChamp < Champ
   validates :value, inclusion: ["M.", "Mme"], allow_nil: true, allow_blank: false
 
+  def legend_label?
+    true
+  end
+
   def html_label?
     false
   end