Bump ruby/setup-ruby from 1.256.0 to 1.257.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.256.0 to 1.257.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@efbf473...4451173)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.257.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -76,7 +76,7 @@ jobs:
       - uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
         with:
           go-version: 1.24.1
-      - uses: ruby/setup-ruby@efbf473cab83af4468e8606cc33eca9281bb213f # v1.256.0
+      - uses: ruby/setup-ruby@44511735964dcb71245e7e55f72539531f7bc0eb # v1.257.0
         with:
           ruby-version: 3.2
           bundler-cache: true