Bump cloud_controller_ng

Dependency updates in cloud_controller_ng:

- build(deps): bump json from 2.7.2 to 2.7.5 in /docs/v3
    PR: cloudfoundry/cloud_controller_ng#4059
    Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

- build(deps): bump newrelic_rpm from 9.14.0 to 9.15.0
    PR: cloudfoundry/cloud_controller_ng#4061
    Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>