Bump ruby/setup-ruby from 1.191.0 to 1.254.0 (#1766)

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.191.0 to 1.254.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@v1.191.0...2a7b300)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.254.0
  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/exercise-tests.yml

@@ -22,7 +22,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@a4effe49ee8ee5b8b5091268c473a4628afb5651
+        uses: ruby/setup-ruby@2a7b30092b0caf9c046252510f9273b4875f3db9
         with:
           ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true

.github/workflows/generator-tests.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
       - name: Set up Ruby
-        uses: ruby/setup-ruby@52753b7da854d5c07df37391a986c76ab4615999
+        uses: ruby/setup-ruby@2a7b30092b0caf9c046252510f9273b4875f3db9
         with:
           ruby-version: "3.3"
           bundler-cache: true
@@ -26,7 +26,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
       - name: Set up Ruby
-        uses: ruby/setup-ruby@52753b7da854d5c07df37391a986c76ab4615999
+        uses: ruby/setup-ruby@2a7b30092b0caf9c046252510f9273b4875f3db9
         with:
           ruby-version: "3.3"
           bundler-cache: true