Bump ruby/setup-ruby from 1.204.0 to 1.206.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.204.0 to 1.206.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@401c19e...bfefad8)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Ruby ${{ matrix.ruby }}
-      uses: ruby/setup-ruby@401c19e14f474b54450cd3905bb8b86e2c8509cf #v1.190.0 tag
+      uses: ruby/setup-ruby@bfefad842bb982ff05b233bcbc1571d97a87e69f #v1.190.0 tag
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true