docs updated

README.md

@@ -32,12 +32,12 @@ But so far only Linux is actively tested.
 It might support all versions Qt >= 5.15, but you can rely on:
 
 - Qt 5.15
-- current long term supported ( LTS ) version of Qt
+- current long term supported ( LTS ) version of Qt ( at the moment Qt 6.5.x )
 - current version of Qt
 
-On debian bullseye these packages need to be installed: `build-essential
-qt-qmake qtbase5-dev qtbase5-private-dev qtdeclarative5-dev
-qtdeclarative5-private-dev libqt5svg5-dev`.
+On debian bullseye these packages need to be installed for Qt5: `build-essential
+qtbase5-dev qtbase5-private-dev qtdeclarative5-dev qtdeclarative5-private-dev libqt5svg5-dev`.
+For Qt6 you need the corresponding ones.
 
 > Optional: When enabling the `hunspell` feature the following package needs to be installed: `libhunspell-dev`