Fix link to create a new budget investment

app/views/budgets/index.html.erb

@@ -33,7 +33,7 @@
             <% if current_user %>
               <% if current_user.level_two_or_three_verified? %>
                 <%= link_to t("budgets.investments.index.sidebar.create"),
-                            new_budget_investment_path(@budget),
+                            new_budget_investment_path(current_budget),
                             class: "button margin-top expanded" %>
               <% else %>
                 <div class="callout warning margin-top">

spec/features/budgets/budgets_spec.rb

@@ -124,6 +124,15 @@ feature 'Budgets' do
 
       expect(page).to have_content "There are no budgets"
     end
+
+    scenario "Accepting" do
+      budget.update(phase: "accepting")
+      login_as(create(:user, :level_two))
+
+      visit budgets_path
+
+      expect(page).to have_link "Create a budget investment"
+    end
   end
 
   scenario 'Index shows only published phases' do