multimedia/plexmediaserver: update to 1.42.2.10156

Changelog: https://forums.plex.tv/t/plex-media-server/30447/691

Plex Media Server 1.42.2.10156 is now available to everyone.

PR: 289789
Reported by: Ben Shertenlieb <b.shertenlieb@yahoo.com> (maintainer)