bump atc
bump atc

Submodule src/github.com/concourse/atc 31a6297..932edbc:
  > load top bar before the rest of the page

concourse/concourse,cjcjameson/concourse,concourse/concourse,concourse/concourse,concourse/concourse,cjcjameson/concourse,concourse/concourse,cjcjameson/concourse