Bump ruby/setup-ruby from 1.207.0 to 1.208.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.207.0 to 1.208.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@v1.207.0...v1.208.0)

---
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

@@ -14,7 +14,7 @@ jobs:
       - name: Install Homebrew Packages
         run: brew install lapack openblas # for classifier-reborn
       - name: Setup Ruby
-        uses: ruby/setup-ruby@v1.207.0
+        uses: ruby/setup-ruby@v1.208.0
         with:
           bundler-cache: true
       - name: Build the site