test: explicitly reference org rels in "coordinator user's org doesn't hold stock" managing org test

spec/features/lettings_log_spec.rb

@@ -282,6 +282,7 @@ RSpec.describe "Lettings Log Features" do
           click_button("Save and continue")
           visit("lettings-logs/#{log_id}/setup/check-answers")
           expect(page).to have_content("Managing agent User org")
+          expect(user.organisation.stock_owners).to eq([org_rel1.parent_organisation, org_rel2.parent_organisation])
         end
       end