chore(deps): update ruby/setup-ruby action to v1.319.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	Pending
ruby/setup-ruby	action	minor	v1.318.0 → v1.319.0	v1.321.0 (+1)

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Release Notes

ruby/setup-ruby (ruby/setup-ruby)

v1.319.0

Compare Source

What's Changed

• Add ruby-3.3.12 by @​ruby-builder-bot in #​930

Full Changelog: ruby/setup-ruby@v1.318.0...v1.319.0

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Note

Low Risk
CI-only dependency pin with no application or runtime code changes.

Overview
Bumps the pinned ruby/setup-ruby GitHub Action in .github/actions/setup/action.yml from v1.318.0 to v1.319.0 (commit SHA updated accordingly). CI workflows that use this composite action will run the newer action release, which adds Ruby 3.3.12 to the install matrix; Ruby version and Bundler inputs are unchanged.

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