add comment about using AWS_ACCESS_KEY_ID env var by removing profile_name
add comment about using AWS_ACCESS_KEY_ID env var by removing profile_name

pjz/Zappa,Miserlou/Zappa,mathom/Zappa,Miserlou/Zappa,anush0247/Zappa,anush0247/Zappa,pjz/Zappa,mathom/Zappa,scoates/Zappa,scoates/Zappa