Fix RSpec/LetBeforeExamples rubocop offense

This was accidentally introduced in commit 64aa1ffe0. Pronto didn't
detect it because the line itself was fine; the problem lied in its
place within the file.

spec/system/legislation/questions_spec.rb

@@ -2,8 +2,6 @@ require "rails_helper"
 
 describe "Legislation" do
   context "process debate page" do
-    it_behaves_like "notifiable in-app", :legislation_question
-
     let(:process) do
       create(:legislation_process,
              debate_start_date: Date.current - 3.days,
@@ -16,6 +14,8 @@ describe "Legislation" do
       create(:legislation_question, process: process, title: "Question 3", description: "Description 3")
     end
 
+    it_behaves_like "notifiable in-app", :legislation_question
+
     scenario "shows question list" do
       visit legislation_process_path(process)