Bump ruby/setup-ruby from 1.191.0 to 1.194.0 (#1720)

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.191.0 to 1.194.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@52753b7...c04af2b)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/exercise-tests.yml

@@ -22,7 +22,7 @@ jobs:
       - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@52753b7da854d5c07df37391a986c76ab4615999
+        uses: ruby/setup-ruby@c04af2bb7258bb6a03df1d3c1865998ac9390972
         with:
           ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true