bodhi: set primary arches for current stable releases
    
    bodhi is failing to finish a f40-updates-testing push because it's
    looking for the ppc64le repomd on the primary location instead of the
    secondary one.
    
    This should fix it, but I don't understand how it worked before.
    Did we just get lucky and always check aarch64 before anything else?
    I can't see anything that changed in config around this off hand. ;(
    
    Will try this and see if it fixes it for now...
    
    Signed-off-by: Kevin Fenzi <kevin@scrye.com>