Non-Qubes-Whonix only fix:
sudo apt-key --keyring /etc/apt/trusted.gpg.d/torprojectarchive.gpg adv --keyserver hkp://ipv4.pool.sks-keyservers.net:80 --recv-keys A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89
Qubes-Whonix fix:
Did it work to proxy through Qubes updates proxy? @0brand Could you add please?
Page Installing Newer Tor Versions was missing advice to install package deb.torproject.org-keyring which keeps the signing key updated. Just now added.