Whenever you want to post a link but can’t, do as follows (goes for anyone who doesn’t have the appropriate trust level)
`www.example.com`
This will result in
www.example.com
Usually if the link is useful/relevant someone will link it for you.
Note that to post links to trusted websites (any Blizzard site, Wowhead, Youtube, Twitch etc.) trust level 2 is enough.
For more information on trust levels and forum formatting you can go here