To consistently return the latest version number even when it is no longer
at the bottom of the alphanumeric list on the Jitsi stable download page.
Based on fix by @sbruder in 13760b87d2
This change is adapted from a different jibri package, written by
@puckipedia for nixcon-video-infra 2020 along with a module for jibri.
Co-authored-by: Puck Meerburg <puck@puck.moe>