Release and End of Support dates no longer documented

The recent update ( QTBUG.128581 ) lost critical information on Documentation of End of Support (EoS). We need doc.qt.io page that has the release dates and EoS dates documented, and it should be under https://doc.qt.io/qt-6/qt-releases.html#supported-versions 

I was just in a customer meeting and again had to refer to a wiki for the dates, instead of doc.qt.io as being the authority on this topic.

Side note, do not call it End of Life (EoL) as it is not in fact an EoL, we do we do offer ES and other services to releases beyond EoS dates.