shortwave: mark as broken

Crashes at runtime:

(de.haeckerfelix.Shortwave:347903): Gtk-ERROR **: 00:33:56.355: failed to add UI from resource /de/haeckerfelix/Shortwave/gtk/featured_carousel.ui: .:12:50 Invalid property: AdwCarousel.animation_duration

pkgs/applications/audio/shortwave/default.nix

@@ -80,6 +80,7 @@ stdenv.mkDerivation rec {
       desktop. It is the successor to the older Gradio application.
     '';
     maintainers = with maintainers; [ lasandell ];
+    broken = true; # incompatible with latest libadwaita
     license = licenses.gpl3Plus;
     platforms = platforms.linux;
   };