docs within /doc/book/system-administration are not updating on jenkins.io live

[helloimalemur]

documentation changes within repo are not being updated on jenkins.io live, at least within /doc/book/system-administration.

to observe, compare;
https://github.com/jenkins-infra/jenkins.io/blob/master/content/doc/book/system-administration/reverse-proxy-configuration-with-jenkins/reverse-proxy-configuration-nginx.adoc
to;
https://www.jenkins.io/doc/book/system-administration/reverse-proxy-configuration-nginx/

or
https://github.com/jenkins-infra/jenkins.io/blob/master/content/doc/book/system-administration/reverse-proxy-configuration-with-jenkins/reverse-proxy-configuration-haproxy.adoc
to;
https://www.jenkins.io/doc/book/system-administration/reverse-proxy-configuration-haproxy/

[zbynek]

https://www.jenkins.io/doc/book/system-administration/reverse-proxy-configuration-with-jenkins/reverse-proxy-configuration-nginx/ is the correct link, problem is that content never gets deleted, so if the path to a documentation section changes, both old and new version stay online. I'm pretty sure there was a ticket for that, but since I can't find it I created a PR #6677

[lemeurherve]

Closed by #6677, see jenkins-infra/helpdesk#3360 (comment)