TB Bookmarks: Add the Tor forum .onion to the bookmarks

Yes, I know there is a link to "Tor Community", but I believe a direct and separate link to the Tor forums would be a great addition so users, especially new users, don't have to hunt around for it.

Originally, I posted this to Tails/Gitlab:

https://gitlab.tails.boum.org/tails/tails/-/issues/20320

But it was rightly closed by intrigeri who said:

"AFAIK we ship the same bookmarks as Tor Browser upstream and I don't think we should diverge from them, especially to add bookmarks to Tor resources, so please take this suggestion to Tor :)"

So how about it? 🐰