Bump ruby/setup-ruby from 1.276.0 to 1.281.0 (#390)

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.276.0 to 1.281.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@ae195bb...675dd7b)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.281.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
         with:
           persist-credentials: false
-      - uses: ruby/setup-ruby@ae195bbe749a7cef685ac729197124a48305c1cb # v1
+      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler: latest # to get this fix: https://github.com/rubygems/rubygems/issues/6165
@@ -72,7 +72,7 @@ jobs:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v4
         with:
           persist-credentials: false
-      - uses: ruby/setup-ruby@ae195bbe749a7cef685ac729197124a48305c1cb # v1
+      - uses: ruby/setup-ruby@675dd7ba1b06c8786a1480d89c384f5620a42647 # v1
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true