Bump ruby/setup-ruby from 1.230.0 to 1.233.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.230.0 to 1.233.0.
- [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...ca041f9)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.233.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/rspec.yml

@@ -70,7 +70,7 @@ jobs:
           token: ${{ secrets.GOVUK_CI_GITHUB_API_TOKEN }}
 
       - name: Setup Ruby
-        uses: ruby/setup-ruby@e5ac7b085f6e63d49c8973eb0c6e04d876b881f1 # v1.230.0
+        uses: ruby/setup-ruby@ca041f971d66735f3e5ff1e21cc13e2d51e7e535 # v1.233.0
         with:
           bundler-cache: true
         env: