Wire matrix_bot_maubot_hostname via group vars

group_vars/matrix_servers

@@ -2139,6 +2139,8 @@ matrix_bot_maubot_systemd_required_services_list_auto: |
     ([devture_postgres_identifier ~ '.service'] if (devture_postgres_enabled and matrix_bot_maubot_database_hostname == devture_postgres_connection_hostname) else [])
   }}
 
+matrix_bot_maubot_hostname: "{{ matrix_server_fqn_matrix }}"
+
 matrix_bot_maubot_homeserver_url: "{{ matrix_addons_homeserver_client_api_url }}"
 
 matrix_bot_maubot_homeserver_secret: |-