Update comment to reflect support file location
Update comment to reflect support file location

The other comment change is a clarification. I think that "compilation code" is a clearer name than "bin/compile code".
# Conflicts:
#       bin/compile

Scalingo/ruby-buildpack,zunda/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby,orenyk/heroku-buildpack-ruby,brightbytes/heroku-buildpack-ruby-without-assets-precompile,brightbytes/heroku-buildpack-ruby-without-assets-precompile,makifund/heroku-buildpack-ruby,Genius/heroku-buildpack-ruby,orenyk/heroku-buildpack-ruby,zunda/heroku-buildpack-ruby,instacart/heroku-buildpack-ruby,Genius/heroku-buildpack-ruby,heroku/heroku-buildpack-ruby,Scalingo/ruby-buildpack,makifund/heroku-buildpack-ruby