Sth like this could be spotted by the docs-builder

[OskarStark]

symfony/symfony-docs#11032

symfony/symfony-docs#11030

[javiereguiluz]

I'm closing this as "won't fix" because I don't see any way in this could be automated. Many times, the references refer to old headlines which we reworded. So, we can't remove them because that'd break the links with anchors.

Thanks.