make-koji-release-tags: add f*-coreos-continuous tags
    
    We want these created at the same time as everything else is. See
    https://pagure.io/releng/issue/8165 for the original tag request and
    https://pagure.io/releng/issue/8938 for adding it to this script.
    
    Signed-off-by: Jonathan Lebon <jonathan@jlebon.com>