README: fix another Enlish typo
README: fix another Enlish typo

Signed-off-by: 184831158ae7531bcabc22617ed51e8717c81e93@redhat.com
rmohr/kubevirt,stu-gott/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,davidvossel/kubevirt,davidvossel/kubevirt,rmohr/kubevirt,admiyo/kubevirt,fabiand/kubevirt,mpolednik/kubevirt,kubevirt/kubevirt,fabiand/kubevirt,stu-gott/kubevirt,admiyo/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,mpolednik/kubevirt,stu-gott/kubevirt