Bump ruby/setup-ruby from 1.230.0 to 1.231.0 (#25)

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.230.0 to 1.231.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@e5ac7b0...d8d83c3)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.231.0
  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>

Author: dependabot[bot]

.github/workflows/jruby.yml

@@ -35,7 +35,7 @@ jobs:
       - run: rm -f Gemfile.lock
       - run: rm -f .ruby-version
       - name: Set up Ruby
-        uses: ruby/setup-ruby@e5ac7b085f6e63d49c8973eb0c6e04d876b881f1 # v1.230.0
+        uses: ruby/setup-ruby@d8d83c3960843afb664e821fed6be52f37da5267 # v1.231.0
         with:
           ruby-version: ${{ matrix.ruby }}
           rubygems: latest

.github/workflows/rspec.yml

@@ -33,7 +33,7 @@ jobs:
       - run: rm -f Gemfile.lock
       - run: rm -f .ruby-version
       - name: Set up Ruby
-        uses: ruby/setup-ruby@e5ac7b085f6e63d49c8973eb0c6e04d876b881f1 # v1.230.0
+        uses: ruby/setup-ruby@d8d83c3960843afb664e821fed6be52f37da5267 # v1.231.0
         with:
           ruby-version: ${{ matrix.ruby }}
           rubygems: latest