Pending things from the Rails update:

• update @rails/ujs to latest compatible version: https://www.npmjs.com/package/@rails/ujs/v/7.1.501 (there isn't a 7.2 version as far as I see) - Bump @rails/activestorage npm package from v7.0 to v7.2 #14830
• update @rails/activestorage to latest compatible version: https://www.npmjs.com/package/@rails/activestorage/v/7.2.201 - Bump @rails/activestorage npm package from v7.0 to v7.2 #14830
• add the new_framework_defaults_7_2.rb file, so we have the backlog for the next PR (changing defaults from 7.1 to 7.2) - Add Rails 7.2 framework defaults file #14829
• while reading about this update, I found out about the change with the development secrets that we talked in Update Rails to v7.1 #13267. I'd recommend renaming the file in our Releases Notes:

  decidim/RELEASE_NOTES.md

  Line 81 in 5cea8a4

  ⚠ **Important**: Local environment variable introduced

  - Patch release notes to add new info about local secrets #14831
• while reading the Releases Notes, I saw that we're mentioning that implementers should remove the decidim initializer

  decidim/RELEASE_NOTES.md

  Line 38 in 5cea8a4

  git rm config/initializers/decidim.rb

  but we're still generating it for new apps. We should remove that from the generator
• another pending thing related to the Env Vars/initailizer/secrets change is this clean-up Clean-up Environment Variables change #14446

Originally posted by @andreslucena in #14784 (review)