Qt 6.0.0 is new major version for Qt and so on we don't need to
list changes to the previous Qt release but quide readers to check
porting quide.
Task-number: QTBUG-88099
Change-Id: I6d93561980baa09e779ea09a7f805c8b800e0102
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
Jani Heikkinen