Bump ruby/setup-ruby from 1.246.0 to 1.256.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.246.0 to 1.256.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@a4f8389...efbf473)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.256.0
  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: Checkout
         uses: actions/checkout@v4
       - name: Setup Ruby
-        uses: ruby/setup-ruby@a4f838919020b587bb8dd4493e8881bb113d3be7
+        uses: ruby/setup-ruby@efbf473cab83af4468e8606cc33eca9281bb213f
         with:
           ruby-version: '3.1' # Not needed with a .ruby-version file
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically

.github/workflows/pages.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup Ruby
-        uses: ruby/setup-ruby@a4f838919020b587bb8dd4493e8881bb113d3be7
+        uses: ruby/setup-ruby@efbf473cab83af4468e8606cc33eca9281bb213f
         with:
           ruby-version: '3.1' # Not needed with a .ruby-version file
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically