releasing: Add WG-Notebooks leads to release owners (#5777)
releasing: Add WG-Notebooks leads to release owners (#5777)

Signed-off-by: Yannis Zarkadas <4575790e8e8b84da294884a87fd791e10dfc7d9d@arrikto.com>
kubeflow/kubeflow,kubeflow/kubeflow,kubeflow/kubeflow,kubeflow/kubeflow,kubeflow/kubeflow,kubeflow/kubeflow