Documentation not up to date?

[jmartens]

You documentation website seems to mention v5.12.0 in its header and judging from #4326 and the 6.x release notes breaking changes section it is not up-to-date. Am I correct?

The Mainline mode and the related implementation has been removed completely. The new Mainline version strategy should be used instead.

[arturcic]

We try to keep it up to date, but I can agree that we need to review the latest version of the state of the codebase