bump web
bump web

concourse/concourse#227

Submodule src/github.com/concourse/web cd8c7f85..698b46a2:
  > Make legend non-clickable in pipeline view
  > Add high density dashboard view

Signed-off-by: Rui Yang <10d6ef426b5f71d33c3d9e2459db4a0e3700cdde@pivotal.io>

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse