Bump ruby/setup-ruby from 1.299.0 to 1.306.0 (#1831)

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.299.0 to 1.306.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@3ff19f5...c4e5b13)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.306.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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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@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
       - name: Set up Ruby
-        uses: ruby/setup-ruby@3ff19f5e2baf30647122352b96108b1fbe250c64
+        uses: ruby/setup-ruby@c4e5b1316158f92e3d49443a9d58b31d25ac0f8f
         with:
           ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true

.github/workflows/generator-tests.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
       - name: Set up Ruby
-        uses: ruby/setup-ruby@3ff19f5e2baf30647122352b96108b1fbe250c64
+        uses: ruby/setup-ruby@c4e5b1316158f92e3d49443a9d58b31d25ac0f8f
         with:
           ruby-version: "3.3"
           bundler-cache: true
@@ -26,7 +26,7 @@ jobs:
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
       - name: Set up Ruby
-        uses: ruby/setup-ruby@3ff19f5e2baf30647122352b96108b1fbe250c64
+        uses: ruby/setup-ruby@c4e5b1316158f92e3d49443a9d58b31d25ac0f8f
         with:
           ruby-version: "3.3"
           bundler-cache: true