Bump cloud_controller_ng

Dependency updates in cloud_controller_ng:

- build(deps): bump rdoc from 7.1.0 to 7.2.0
    PR: cloudfoundry/cloud_controller_ng#4840
    Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: ari-wg-gitbot