Bump ruby/setup-ruby from 1.310.0 to 1.312.0 (#271)

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.310.0 to 1.312.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@afeafc3...12fd324)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.312.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.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@afeafc3d1ab54a631816aba4c914a0081c12ff2f # v1.310.0
+        uses: ruby/setup-ruby@12fd324f1d0b43274fdc8130f6980590a667c455 # v1.312.0
         with:
           ruby-version: ${{ matrix.ruby }}
           rubygems: latest