Bump ruby/setup-ruby from 1.255.0 to 1.256.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.255.0 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@829114f...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] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
     timeout-minutes: 30
     steps:
     - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-    - uses: ruby/setup-ruby@829114fc20da43a41d27359103ec7a63020954d4 # v1.255.0
+    - uses: ruby/setup-ruby@efbf473cab83af4468e8606cc33eca9281bb213f # v1.256.0
       with:
         bundler-cache: true
         ruby-version: "2.7.2"