scripts: fix prerelease detection
scripts: fix prerelease detection

TranscendComputing/packer,smerrill/packer,TranscendComputing/packer,suma/packer,smerrill/packer,suma/packer,msabramo/packer,msabramo/packer,Kaixiang/packer,suma/packer,patricklucas/packer,suma/packer,TranscendComputing/packer,patricklucas/packer,patricklucas/packer,Kaixiang/packer,Kaixiang/packer,smerrill/packer,Kaixiang/packer,zyegfryed/packer,patricklucas/packer,zyegfryed/packer,TranscendComputing/packer,zyegfryed/packer,smerrill/packer,zyegfryed/packer,msabramo/packer,msabramo/packer