Update binstubs

bin/rails

@@ -4,8 +4,6 @@ begin
 rescue LoadError => e
   raise unless e.message.include?('spring')
 end
-# This command will automatically be run when you run "rails" with Rails 3 gems installed from the root of your application.
-
-APP_PATH = File.expand_path('../../config/application',  __FILE__)
-require File.expand_path('../../config/boot',  __FILE__)
+APP_PATH = File.expand_path('../config/application', __dir__)
+require_relative '../config/boot'
 require 'rails/commands'