Bump src/cloud_controller_ng:

David Sabeti and Tim Labeeuw (2):
      Refactor/Add HM_Respondent tests
      Copes with HM sending incorrect stop commands [fixes #48374009]

Matthew Boedicker and Max Brunsfeld (2):
      Mark apps as having failed to stage [#48212825]
      Fix description in instances API spec

Phan Le and Ryan Tang (1):
      Return a meaningful message when space guid is invalid in create service requests.