regular.mk: add installation item via vnc to gnome

conf.d/regular.mk

@@ -186,7 +186,8 @@ distro/regular-cinnamon: distro/.regular-gtk mixin/regular-cinnamon; @:
 
 # not .regular-gtk due to gdm vs lightdm
 distro/regular-gnome: distro/.regular-desktop mixin/regular-gnome \
-	use/kernel/latest +plymouth use/browser/epiphany
+	use/kernel/latest +plymouth use/browser/epiphany \
+	use/live-install/vnc/listen; @:
 ifeq (,$(filter-out x86_64 aarch64,$(ARCH)))
 	@$(call set,KFLAVOURS,std-def un-def)
 endif