build(deps): bump ruby/setup-ruby from 1.187.0 to 1.188.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.187.0 to 1.188.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](161cd54b69...50ba3386b0)

---
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>

.github/workflows/docs.yml

@@ -51,7 +51,7 @@ jobs:
         run: vale docs/
 
       - name: Install Ruby
-        uses: ruby/setup-ruby@161cd54b698f1fb3ea539faab2e036d409550e3c # v1.187.0
+        uses: ruby/setup-ruby@50ba3386b050ad5b97a41fcb81240cbee1d1821f # v1.188.0
         with:
           bundler-cache: true
           working-directory: docs

.github/workflows/rubydoc.yml

@@ -38,7 +38,7 @@ jobs:
           path: rubydoc
 
       - name: Install Ruby
-        uses: ruby/setup-ruby@161cd54b698f1fb3ea539faab2e036d409550e3c # v1.187.0
+        uses: ruby/setup-ruby@50ba3386b050ad5b97a41fcb81240cbee1d1821f # v1.188.0
         with:
           bundler-cache: true
           working-directory: rubydoc