fix(jellyfin-session): replace gamescope with session

hopefully fixes the blanking screen issue

Author: Misterio77

hosts/common/optional/jellyfin-session.nix

@@ -3,7 +3,7 @@
     systemctl --user import-environment DISPLAY WAYLAND_DISPLAY
     systemctl --user start jellyfin-kiosk-session.target
     ${lib.getExe' pkgs.pulseaudio "pactl"} set-sink-volume @DEFAULT_SINK@ 80%
-    ${lib.getExe pkgs.gamescope} -- ${lib.getExe' pkgs.jellyfin-media-player "jellyfin-desktop"} --tv --fullscreen
+    ${lib.getExe pkgs.cage} -- ${lib.getExe' pkgs.jellyfin-media-player "jellyfin-desktop"} --tv --fullscreen
     systemctl --user stop jellyfin-kiosk-session.target
   '';