Fix greetd swaynag key binding

modules/greetd/default.nix

@@ -37,7 +37,7 @@ in
             text = ''
               # `-l` activates layer-shell mode. Notice that `swaymsg exit` will run after gtkgreet.
               exec "${pkgs.greetd.gtkgreet}/bin/gtkgreet -l -s /etc/greetd/gtkgreet.css; swaymsg exit"
-              bindsym Mod4+shift+e exec swaynag \
+              bindsym Mod4+shift+f exec swaynag \
                 -t warning \
                 -m 'What do you want to do?' \
                 -b 'Poweroff' 'systemctl poweroff' \