fix failing spec

spec/models/form/question_spec.rb

@@ -108,6 +108,7 @@ RSpec.describe Form::Question, type: :model do
     it "has an update answer link text helper" do
       expect(question.update_answer_link_name(case_log)).to eq("Answer<span class=\"govuk-visually-hidden\"> income</span>")
       case_log[question_id] = 5
+      case_log["incfreq"] = "Weekly"
       expect(question.update_answer_link_name(case_log)).to eq("Change<span class=\"govuk-visually-hidden\"> income</span>")
     end