Solving 'WP-CLI Updates Not Found'

Comments? You can comment on this article on my Mastodon post for "Solving 'WP-CLI Updates Not Found'" That's one (slightly annoying) problem solved - I've managed to upgrade the WordPress version and plugins on https://abulman.co.uk/ on the second attempt. I use WP-CLI to do it all from the command line (and then commit all the changes into Git), but when I last tried to update, it had been…