Update README for v1.5.0-rc.0 (#2124)
Update README for v1.5.0-rc.0 (#2124)

Signed-off-by: Kimonas Sotirchos <263e64aa4503abafc748e2b6a1c92acf6fd6c9b7@arrikto.com>
kubeflow/manifests,kubeflow/manifests