nixos/gnome-remote-desktop: enable pipewire

We need the pipewire service to actually use this.
Tested with g-c-c Sharing.

(cherry picked from commit 94eb65a)

nixos/modules/services/desktops/gnome3/gnome-remote-desktop.nix

@@ -13,6 +13,8 @@ with lib;
 
   ###### implementation
   config = mkIf config.services.gnome3.gnome-remote-desktop.enable {
+    services.pipewire.enable = true;
+
     systemd.packages = [ pkgs.gnome3.gnome-remote-desktop ];
   };
 }