How Upgrading Ruby Broke JavaScript

I was working on a Rails app and finished all my tasks. I wanted to be proactive, and a new Ruby minor version was available (3.2.1). It was almost 5 PM, what better time to upgrade my app?These minor version upgrades are simple, right? I bumped the Ruby version and the CI Docker image, hit bundle install, and the tests passed locally. All good news. I pushed the branch to open a PR, and then… CI broke. What?.