Fix reference to order updater method

Some order updater methods were renamed as part of the in-memory order
updater work. This caused this test to fail because the instance double
wasn't set up for the new method.

Author: AlistairNorman

templates/spec/requests/checkouts_spec.rb

@@ -324,7 +324,7 @@ def post_persist_address
 
       before do
         allow(Spree::OrderUpdater).to receive(:new).and_return(updater_instance)
-        allow(updater_instance).to receive(:update_payment_state).and_raise(Spree::Core::GatewayError.new('Invalid something or other.'))
+        allow(updater_instance).to receive(:recalculate_payment_state).and_raise(Spree::Core::GatewayError.new('Invalid something or other.'))
         patch update_checkout_path(state: order.state, order: { bill_address_attributes: address_params })
       end