Steps to reproduce:

1. Download https://repo.zabbix.com/zabbix/6.0/ubuntu/pool/main/z/zabbix-release/zabbix-release_6.0-2%2Bubuntu22.04_all.deb
2. add to package manager: dpkg -i release[...]
3. install packages: apt install zabbix-server-mysql
4. check version of zabbix_server: zabbix_server -V

Result:

$ zabbix_server -V
zabbix_server (Zabbix) 5.0.17
Revision 0a4ac3dabc 18 October 2021, compilation time: Nov 19 2021 00:15:32

Copyright (C) 2021 Zabbix SIA
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it according to
the license. There is NO WARRANTY, to the extent permitted by law.

Compiled with GnuTLS 3.7.2
Running with GnuTLS 3.7.3

Expected:
version 6.0.4 and a compilation time in 2022