release.py no longer uploads the legacy RELEASES and assets.*.json
manifests — the in-app updater reads only releases.<channel>.json plus
the nupkg it references. The Windows feed nupkg gains its -win channel
marker (vpk omits it for the legacy default channel), so all platforms
are uniformly mediahive-{ver}-{channel}-full.nupkg. The -full suffix is
Velopack's asset type and stays.