More typos

app/models/form/sales/questions/person_student_not_child_value_check.rb

@@ -2,7 +2,7 @@ class Form::Sales::Questions::PersonStudentNotChildValueCheck < ::Form::Question
   def initialize(id, hsh, page, person_index:)
     super(id, hsh, page)
     @id = "student_not_child_value_check"
-    @check_answer_label = "Student not child confirmation"
+    @check_answer_label = "Student not a child confirmation"
     @type = "interruption_screen"
     @answer_options = {
       "0" => { "value" => "Yes" },

spec/models/form/sales/questions/person_student_not_child_value_check_spec.rb

@@ -16,11 +16,11 @@ RSpec.describe Form::Sales::Questions::PersonStudentNotChildValueCheck, type: :m
   end
 
   it "has the correct header" do
-    expect(question.header).to eq("Are you sure this person is not child?")
+    expect(question.header).to eq("Are you sure this person is not a child?")
   end
 
   it "has the correct check_answer_label" do
-    expect(question.check_answer_label).to eq("Student not child confirmation")
+    expect(question.check_answer_label).to eq("Student not a child confirmation")
   end
 
   it "has the correct type" do