CMake: raise KDE Frameworks minimum required version to 5.86
The requirement for KF5Wayland was raised by 4aa1bc3a which requires https://invent.kde.org/frameworks/kwayland/-/merge_requests/43 which was first released in KF5Wayland 5.86.
The requirement for KF5Wayland was raised by 4aa1bc3a which requires https://invent.kde.org/frameworks/kwayland/-/merge_requests/43 which was first released in KF5Wayland 5.86.