Certbot-auto depreciated on Ubuntu 20.04

[hungrymonkey]

certbot/certbot#7941 (comment)

 InRelease\nGet:3 http://us-east-2.ec2.archive.ubuntu.com/ubuntu focal-backports InRelease [98.3 kB]\nGet:4 http://security.ubuntu.com/ubuntu focal-security InRelease [107 kB]\nFetched 205 kB in 1s (312 kB/s)\nReading package lists...\nReading package lists...\nBuilding dependency tree...\nReading state information...\nPackage python-virtualenv is not available, but is referred to by another package.\nThis may mean that the package is missing, has been obsoleted, or\nis only available from another source", "stdout_lines": ["Bootstrapping dependencies for Debian-based OSes... (you can skip this with --no-bootstrap)", "Hit:1 http://us-east-2.ec2.archive.ubuntu.com/ubuntu focal InRelease", "Hit:2 http://us-east-2.ec2.archive.ubuntu.com/ubuntu focal-updates InRelease", "Get:3 http://us-east-2.ec2.archive.ubuntu.com/ubuntu focal-backports InRelease [98.3 kB]", "Get:4 http://security.ubuntu.com/ubuntu focal-security InRelease [107 kB]", "Fetched 205 kB in 1s (312 kB/s)", "Reading package lists...", "Reading package lists...", "Building dependency tree...", "Reading state information...", "Package python-virtualenv is not available, but is referred to by another package.", "This may mean that the package is missing, has been obsoleted, or", "is only available from another source"]}

I did not know how it worked last time. Oh well.