Correct the link in Cases/Specstest/README.md.
Correct the link in Cases/Specstest/README.md.

ChengTiesheng/oct,hqhq/oct,hustcts/ocp-testing,hustcts/ocp-testing,zenlinTechnofreak/oct,ChengTiesheng/oct,liugenping/oct,Tiesheng/oct,hqhq/oct,wking/rkt-oci,liangchenye/oct,liugenping/oct,huawei-openlab/oct,Tiesheng/oct,wangkirin/oct