Work on this was already started for the documentation in
1abdfe5d5a.
The CMake target (docs_QuickControls2) probably can't be renamed
until we rename the library, which won't happen until Qt 7.
Task-number: QTBUG-95413
Change-Id: Ied20805a91286436606577c3de39671a447f27dd
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>