[ZMR] Zombie Master Reborn server file out-of-date

[hellodub]

Zombie Master Reborn server file is out-of-date. LinuxGSM installs (and updates to) Beta 5, but latest release is Beta 6.

Steam Community announcement: https://steamcommunity.com/groups/zmreborn/announcements/detail/5391352763137704537

ModDB: https://www.moddb.com/mods/zombie-master-reborn/downloads/zombie-master-reborn-beta-6-linux