Files systemd/jboss-eap-standalone.conf and systemd/jboss-eap-domain.conf contain link to 7.4 documentation in the comments.

https://docs.redhat.com/en/documentation/red_hat_jboss_enterprise_application_platform/html-single/configuration_guide/index/index#shut_down_servers_gracefully_using_management_cli

We should consider either removing the link (sounds like least work for the future), updating it to the latest docs (might need a future change) or at least point it to some 8.x variant of the docs.