Sort project versions

[lime]

This is a partial fix for #400. I'll do a PR in dry-rb/devtools with the matching tooling change.

For the record, this ordering is what we get with:

project_versions.sort_by! { |entry| entry["value"].split(".").map(&:to_i) }.reverse!

I looked at a previous version of projects.yml, and it looks like most projects used to be in descending version order, with main last.

I could see some value in moving main first in the list, since it's even more recent than the last numbered version. The code for that would be a little more involved, but it's doable if that's preferred. :)