changed formatted date in AnswerHelper to use :govuk_zero_pad (from d…

…ate_formats initializer)

app/helpers/answer_helper.rb

@@ -4,7 +4,7 @@ module AnswerHelper
   def format_answer(answer)
     case answer
     when Date
-      answer = answer.to_formatted_s(:govuk_date)
+      answer = answer.to_formatted_s(:govuk_zero_pad)
     when Time
       answer = answer.in_time_zone.to_formatted_s(:govuk_time)
     end