build(deps): bump ruby/setup-ruby in the all group

Bumps the all group with 1 update: [ruby/setup-ruby](https://github.com/ruby/setup-ruby).


Updates `ruby/setup-ruby` from 1.257.0 to 1.259.0
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@4451173...866b91c)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.259.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: all
...

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

Author: dependabot[bot]

.github/workflows/scheduled.yml

@@ -33,7 +33,7 @@ jobs:
         uses: Homebrew/actions/setup-homebrew@main
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@44511735964dcb71245e7e55f72539531f7bc0eb # v1.257.0
+        uses: ruby/setup-ruby@866b91cc020931c510d42e43e498a7f07d335f60 # v1.259.0
         with:
           bundler-cache: true
 

.github/workflows/tests.yml

@@ -23,7 +23,7 @@ jobs:
         uses: Homebrew/actions/setup-homebrew@main
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@44511735964dcb71245e7e55f72539531f7bc0eb # v1.257.0
+        uses: ruby/setup-ruby@866b91cc020931c510d42e43e498a7f07d335f60 # v1.259.0
         with:
           ruby-version: "3.1"
           bundler-cache: true