Fix metadata
    
    Current build [1] provides
    python3.12dist(pystache) = 0.1~~dev1
    python3dist(pystache) = 0.1~~dev1
    
    which is wrong.
    This patch is fixing this issue.
    
    [1] https://cbs.centos.org/kojifiles/work/tasks/6681/4516681/python3-pystache-0.6.7-1.el10s.noarch.rpm
    
    Related-to: https://review.rdoproject.org/r/q/I4f71075c894304ef5c36ef408879b15804ed46a9