Problem:
TimescaleDB v1.x support was removed in ZBXNEXT-8570, but the documentation was forgotten.

Expected:
User documentation should be updated to reflect that TimescaleDB v1.x support was dropped.

The minimal supported versions right at the moment can be looked up in this file: https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/include/zbx_dbversion_constants.h#57

/* ZBX_*_MIN_VERSION - hard limit */
/* ZBX_*_MIN_SUPPORTED_VERSION - soft limit */