Fix small bug in README.md
Fix small bug in README.md

Signed-off-by: linzhinan <dcaf8624321f9dc0e5d38c2534fb14e619ae2d49@huawei.com>

zenlinTechnofreak/oct,liangchenye/oct,wking/rkt-oci,huawei-openlab/oct,wangkirin/oct