bump atc
bump atc

[finishes #83627264]

Submodule src/github.com/concourse/atc d9331ef..074b19b:
  > fix pipeline refreshing, fix animations in firefox

concourse/concourse,holgero/concourse,CloudCredo/concourse,cjcjameson/concourse,squeedee/concourse,holgero/concourse,concourse/concourse,concourse/concourse,Amit-PivotalLabs/concourse,concourse/concourse,Amit-PivotalLabs/concourse,longnguyen11288/concourse,Amit-PivotalLabs/concourse,holgero/concourse,cjcjameson/concourse,beni55/concourse,concourse/concourse,zachgersh/concourse,zachgersh/concourse,CloudCredo/concourse,squeedee/concourse,jbayer/concourse,jbayer/concourse,beni55/concourse,sedouard/concourse,squeedee/concourse,sedouard/concourse,cjcjameson/concourse,CloudCredo/concourse,beni55/concourse,zachgersh/concourse,sedouard/concourse,longnguyen11288/concourse,jbayer/concourse,longnguyen11288/concourse