Bump ruby/setup-ruby from 1.173.0 to 1.175.0 (#1664)

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.173.0 to 1.175.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Commits](ruby/setup-ruby@5f19ec7...70da3bb)

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

Signed-off-by: dependabot[bot] <support@github.com>
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@9bb56186c3b09b4f86b1c65136769dd318469633
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@5f19ec79cedfadb78ab837f95b87734d0003c899
+        uses: ruby/setup-ruby@70da3bbf44ac06db1b0547ce2acc9380a5270d1e
         with:
           ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true