Bump cloud_controller_ng

Dependency updates in cloud_controller_ng:

- build(deps-dev): bump parallel_tests from 5.5.0 to 5.6.0
    PR: cloudfoundry/cloud_controller_ng#4836
    Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

- build(deps): bump grpc from 1.76.0 to 1.78.0
    PR: cloudfoundry/cloud_controller_ng#4835
    Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

- build(deps): bump oj from 3.16.14 to 3.16.15
    PR: cloudfoundry/cloud_controller_ng#4834
    Author: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: ari-wg-gitbot