Use versionless Qt cmake target

This makes it easier to build against both Qt5 and Qt6

GIT_SILENT

kded/CMakeLists.txt

@@ -75,9 +75,9 @@ kcoreaddons_desktop_to_json (
 target_link_libraries (
    kded_plasmavault
 
-   Qt5::Core
-   Qt5::DBus
-   Qt5::Widgets
+   Qt::Core
+   Qt::DBus
+   Qt::Widgets
 
    KF5::Activities
    KF5::ConfigCore

plasma/CMakeLists.txt

@@ -34,8 +34,8 @@ kcoreaddons_desktop_to_json (
 target_link_libraries (
    plasma_applet_vault
 
-   Qt5::Gui
-   Qt5::DBus
+   Qt::Gui
+   Qt::DBus
 
    KF5::Activities
    KF5::I18n