motd: Fix Questions List address

Following mailing lists migration from Mailman to Mlmmj.

https://lists.FreeBSD.org/mailman/listinfo/freebsd-questions/
-->
https://lists.freebsd.org/subscription/freebsd-questions

Adding a short link (as we already have for Faq and Handbook), so all
links can be indented the same way.

Reviewed by:	imp (earlier version)
Approved by:	lwhsu
Differential Revision: https://reviews.freebsd.org/D33101

usr.bin/login/motd.template

@@ -5,7 +5,7 @@ Release Notes, Errata: https://www.FreeBSD.org/releases/
 Security Advisories:   https://www.FreeBSD.org/security/
 FreeBSD Handbook:      https://www.FreeBSD.org/handbook/
 FreeBSD FAQ:           https://www.FreeBSD.org/faq/
-Questions List: https://lists.FreeBSD.org/mailman/listinfo/freebsd-questions/
+Questions List:        https://www.FreeBSD.org/lists/questions/
 FreeBSD Forums:        https://forums.FreeBSD.org/
 
 Documents installed with the system are in the /usr/local/share/doc/freebsd/