Bump ruby/setup-ruby from 1.315.0 to 1.321.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.315.0 to 1.321.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@0dafeac...95ef2b0)

---
updated-dependencies:
- dependency-name: ruby/setup-ruby
  dependency-version: 1.300.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/cache-downloads.yml

@@ -16,7 +16,7 @@ jobs:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       with:
         persist-credentials: false
-    - uses: ruby/setup-ruby@0dafeac902942906541bc140009cdbf32665b601 # v1.315.0
+    - uses: ruby/setup-ruby@95ef2b042f9d7a56d8268cba8559e2842e2ad01b # v1.321.0
       with:
         ruby-version: '4'
         bundler-cache: true

.github/workflows/check.yml

@@ -28,7 +28,7 @@ jobs:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       with:
         persist-credentials: false
-    - uses: ruby/setup-ruby@0dafeac902942906541bc140009cdbf32665b601 # v1.315.0
+    - uses: ruby/setup-ruby@95ef2b042f9d7a56d8268cba8559e2842e2ad01b # v1.321.0
       with:
         ruby-version: "${{ matrix.ruby }}"
         bundler-cache: true

.github/workflows/livecheck.yml

@@ -18,7 +18,7 @@ jobs:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       with:
         persist-credentials: false
-    - uses: ruby/setup-ruby@0dafeac902942906541bc140009cdbf32665b601 # v1.315.0
+    - uses: ruby/setup-ruby@95ef2b042f9d7a56d8268cba8559e2842e2ad01b # v1.321.0
       with:
         ruby-version: '4'
         bundler-cache: true

.github/workflows/rubocop.yml

@@ -12,7 +12,7 @@ jobs:
     - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       with:
         persist-credentials: false
-    - uses: ruby/setup-ruby@0dafeac902942906541bc140009cdbf32665b601 # v1.315.0
+    - uses: ruby/setup-ruby@95ef2b042f9d7a56d8268cba8559e2842e2ad01b # v1.321.0
       with:
         ruby-version: '4'
         bundler-cache: true