fix: make extra-cmake-modules qt6

Author: kaeeraa

nix/unwrapped.nix

@@ -50,7 +50,7 @@ assert lib.assertMsg (gamemodeSupport -> stdenv.hostPlatform.isLinux)
     nativeBuildInputs = [
       cmake
       ninja
-      extra-cmake-modules
+      kdePackages.extra-cmake-modules
       jdk17
       stripJavaArchivesHook
     ];