added a note about macros usage in the deprecated docs
added a note about macros usage in the deprecated docs

nicolas-grekas/Twig,gencer/Twig,gencer/Twig,twigphp/Twig,gamernetwork/Twig,nicolas-grekas/Twig,twigphp/Twig,nicolas-grekas/Twig,twigphp/Twig,gamernetwork/Twig,nicolas-grekas/Twig,nicolas-grekas/Twig,gamernetwork/Twig