Apply Rubocop Style/RedundantConstantBase (#23463)

spec/rails_helper.rb

@@ -33,7 +33,7 @@ Devise::Test::ControllerHelpers.module_eval do
 end
 
 RSpec.configure do |config|
-  config.fixture_path = "#{::Rails.root}/spec/fixtures"
+  config.fixture_path = "#{Rails.root}/spec/fixtures"
   config.use_transactional_fixtures = true
   config.order = 'random'
   config.infer_spec_type_from_file_location!