[docs] b-p-o notifications are moving to another mailing list.

Hi docs@ readers, To enhance readability of this list and mainly to give more chance to humans posting here to receive an answer, I moved (with the help of Ee and our postmaster, thanks to them) the bugs.python.org notifications to docs-bugs@. Feel free to subscribe to docs-bugs@ if you want to receive the b.p.o notifications. => https://mail.python.org/mailman3/lists/docs-bugs.python.org/ Bests, -- [Julien Palard](https://mdk.fr)