Bump cloud_controller_ng

Changes in cloud_controller_ng:

- build(deps): bump golang.org/x/net in /.devcontainer/images/mockserver
    PR: cloudfoundry/cloud_controller_ng#4313
    Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Dependency updates in cloud_controller_ng:

- build(deps-dev): bump rubocop-rails from 2.30.3 to 2.31.0
    PR: cloudfoundry/cloud_controller_ng#4314
    Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: ari-wg-gitbot