Bump ruby/setup-ruby from 1.235.0 to 1.242.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.235.0 to 1.242.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@dffc446...cb0fda5)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.242.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     name: Test Ruby ${{ matrix.entry.ruby }}
     steps:
       - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
-      - uses: ruby/setup-ruby@dffc446db9ba5a0c4446edb5bca1c5c473a806c5 # v1.235.0
+      - uses: ruby/setup-ruby@cb0fda56a307b8c78d38320cd40d9eb22a3bf04e # v1.242.0
         with:
           ruby-version: ${{ matrix.entry.ruby }}
           bundler-cache: true