Where to read about changes between Ruby versions?

Tips for updating Ruby versios? Is there somewhere to look for human-readable changes made between Ruby versions?

I've looked at the Github diffs between Ruby versions which is fine but it's not very readable and can take a long time to parse: https://github.com/ruby/ruby/compare/v2_6_3...v2_6_4

Mostly I just look at ruby-lang.org for the notes in the blog posts.