8deb9fd branching / make-koji-release-tags: set flatpak to use latest for distrepo

Authored and Committed by kevin a month ago
    branching / make-koji-release-tags: set flatpak to use latest for distrepo
    
    There's no reason there to pull in all packages, latest
    should be fine and make dist-repos smaller and take less disk.
    
    Signed-off-by: Kevin Fenzi <kevin@scrye.com>