CLDC-3355: Fix failure in rent type page tests

spec/models/form/lettings/pages/rent_type_spec.rb

@@ -5,7 +5,13 @@ RSpec.describe Form::Lettings::Pages::RentType, type: :model do
 
   let(:page_id) { nil }
   let(:page_definition) { nil }
-  let(:subsection) { instance_double(Form::Subsection, form: instance_double(Form, start_date: Time.zone.local(2024, 4, 1))) }
+  let(:subsection) { instance_double(Form::Subsection) }
+  let(:form) { instance_double(Form, start_date: Time.zone.local(2024, 4, 1)) }
+
+  before do
+    allow(subsection).to receive(:form).and_return(form)
+    allow(form).to receive(:start_year_after_2024?).and_return(true)
+  end
 
   it "has correct subsection" do
     expect(page.subsection).to eq(subsection)