bump receptor stager

[#79618170]

Submodule src/github.com/cloudfoundry-incubator/receptor 04d60ee..d5ef41f:
  > Rename request types
Submodule src/github.com/cloudfoundry-incubator/stager 9cc7ded..f939a52:
  > rename receptor request types

Signed-off-by: Eric Malm <emalm@pivotal.io>