Update compose-tracker to use fedora:34
    
    fedora 35 is throwing
    
    Errors during downloading metadata for repository 'fedora':
      - Curl error (6): Couldn't resolve host name for https://mirrors.fedoraproject.org/metalink?repo=fedora-35&arch=x86_64  [getaddrinfo() thread failed to start]
    Error: Failed to download metadata for repo 'fedora': Cannot prepare internal mirrorlist: Curl error (6): Couldn't resolve host name for https://mirrors.fedoraproject.org/metalink?repo=fedora-35&arch=x86_64  [getaddrinfo() thread failed to start]
    
    Signed-off-by: Mohan Boddu <mboddu@bhujji.com>