Fixes errors in specs related to changes in budget phases

spec/features/valuation/budget_investments_spec.rb

@@ -5,7 +5,7 @@ feature 'Valuation budget investments' do
   background do
     @valuator = create(:valuator, user: create(:user, username: 'Rachel', email: 'rachel@valuators.org'))
     login_as(@valuator.user)
-    @budget = create(:budget, valuating: true)
+    @budget = create(:budget, :valuating)
   end
 
   scenario 'Disabled with a feature flag' do
@@ -392,4 +392,4 @@ feature 'Valuation budget investments' do
       expect(page).to have_content('Only integer numbers', count: 2)
     end
   end
-end
+end