Cache service brownout April 1st caused 422 errors

[julik]

We have encountered 422 errors during the cache service brownout advertised here https://github.blog/changelog/2025-01-15-github-actions-ubuntu-20-runner-image-brownout-dates-and-other-breaking-changes/#actions-cache-v1-v2-and-actions-toolkit-cache-package-closing-down

Can't share in an issue as it requires a public workflow run URL, but ours is private.

It means that when they complete the migration, our bundler cache is going to go INOP it seems. We are using ruby/setup-ruby@v1 as recommended.

Is there any update that is needed to the action for bundler caching to make it compatible with the next version of the GH caching service?