update_jdn: install again virtualbox in o168 for the fdroid jobs

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

update_jdn.sh

@@ -527,10 +527,8 @@ if [ -f /etc/debian_version ] ; then
 				python3-setuptools
 				subversion
 				vagrant
+				virtualbox/bullseye-fasttrack virtualbox-dkms/bullsey-fasttrack
 				"
-				#virtualbox virtualbox-dkms
-				# for an old virtualbox that can be on buster at least
-				#deb https://snapshot.debian.org/archive/debian/20190717T213444Z/ main contrib
 				;;
 			*) ;;
 		esac