Add website mirrors to "How do I download Tor Browser if the torproject.org is blocked?"
We should add that people can download Tor Browser from our mirrors: https://tor.eff.org https://tor.ccc.de/ and let's pull some more addresses from here: https://2019.www.torproject.org/getinvolved/mirrors.html.en
Support question to update: https://support.torproject.org/gettor/gettor-1/