Switch to Beta upgrade channel

install/sql/system.sql

@@ -296,7 +296,7 @@ SET @iCategoryId = LAST_INSERT_ID();
 INSERT INTO `sys_options`(`category_id`, `name`, `caption`, `value`, `type`, `extra`, `check`, `check_params`, `check_error`, `order`) VALUES
 (@iCategoryId, 'sys_cron_time', '_adm_stg_cpt_option_sys_cron_time', '0', 'digit', '', '', '', '', 2),
 (@iCategoryId, 'sys_install_time', '_adm_stg_cpt_option_sys_install_time', '0', 'digit', '', '', '', '', 3),
-(@iCategoryId, 'sys_upgrade_channel', '_adm_stg_cpt_option_sys_upgrade_channel', 'stable', 'select', 'stable,beta', '', '', '', 4),
+(@iCategoryId, 'sys_upgrade_channel', '_adm_stg_cpt_option_sys_upgrade_channel', 'beta', 'select', 'stable,beta', '', '', '', 4),
 (@iCategoryId, 'sys_revision', '_adm_stg_cpt_option_sys_revision', '0', 'digit', '', '', '', '', 5),
 (@iCategoryId, 'sys_eq_time', '_adm_stg_cpt_option_sys_eq_time', '0', 'digit', '', '', '', '', 6),
 (@iCategoryId, 'sys_push_queue_time', '_adm_stg_cpt_option_sys_push_queue_time', '0', 'digit', '', '', '', '', 7),