Only try to build with Qt6/KF6 now.
Changed KF5DocTools to KF${KF_MAJOR_VERSION}DocTools and removed ci checks for qt5.
Not sure who to get to review, will likely merge once CI passes, etc.
Changed KF5DocTools to KF${KF_MAJOR_VERSION}DocTools and removed ci checks for qt5.
Not sure who to get to review, will likely merge once CI passes, etc.