Bump cloud_controller_ng

Changes in cloud_controller_ng:

- Use https in docs Gemfile
    PR: cloudfoundry/cloud_controller_ng#4322
    Author: Tim Downey <tcdowney@users.noreply.github.com>

Dependency updates in cloud_controller_ng:

- build(deps-dev): bump rubocop from 1.75.2 to 1.75.3
    PR: cloudfoundry/cloud_controller_ng#4319
    Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: ari-wg-gitbot