Move sales staircasing question (#2777)

* Change order

* Update test

app/models/form/sales/subsections/setup.rb

@@ -13,8 +13,8 @@ class Form::Sales::Subsections::Setup < ::Form::Subsection
       Form::Sales::Pages::CreatedBy.new(nil, nil, self),
       Form::Sales::Pages::PurchaserCode.new(nil, nil, self),
       Form::Sales::Pages::OwnershipScheme.new(nil, nil, self),
-      (Form::Sales::Pages::Staircase.new(nil, nil, self) if form.start_year_2025_or_later?),
       Form::Sales::Pages::SharedOwnershipType.new(nil, nil, self),
+      (Form::Sales::Pages::Staircase.new(nil, nil, self) if form.start_year_2025_or_later?),
       Form::Sales::Pages::DiscountedOwnershipType.new(nil, nil, self),
       (Form::Sales::Pages::OutrightOwnershipType.new(nil, nil, self) unless form.start_year_2025_or_later?),
       (Form::Sales::Pages::BuyerCompany.new(nil, nil, self) unless form.start_year_2025_or_later?),

spec/models/form/sales/subsections/setup_spec.rb

@@ -93,8 +93,8 @@ RSpec.describe Form::Sales::Subsections::Setup, type: :model do
           assigned_to
           purchaser_code
           ownership_scheme
-          staircasing
           shared_ownership_type
+          staircasing
           discounted_ownership_type
           joint_purchase
           number_joint_buyers