Use capture_emails helper to improve email assertions in specs (#29245)

spec/rails_helper.rb

@@ -82,6 +82,7 @@ RSpec.configure do |config|
   config.include Devise::Test::ControllerHelpers, type: :view
   config.include Devise::Test::IntegrationHelpers, type: :feature
   config.include Devise::Test::IntegrationHelpers, type: :request
+  config.include ActionMailer::TestHelper
   config.include Paperclip::Shoulda::Matchers
   config.include ActiveSupport::Testing::TimeHelpers
   config.include Chewy::Rspec::Helpers