Bump ruby/setup-ruby from 1.218.0 to 1.221.0

Bumps [ruby/setup-ruby](https://github.com/ruby/setup-ruby) from 1.218.0 to 1.221.0.
- [Release notes](https://github.com/ruby/setup-ruby/releases)
- [Changelog](https://github.com/ruby/setup-ruby/blob/master/release.rb)
- [Commits](ruby/setup-ruby@v1.218.0...v1.221.0)

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

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

.github/workflows/BuildDeploy.yml

@@ -23,7 +23,7 @@ jobs:
           repository: jekyll/minima
           ref: demo-site
       - name: Set up Ruby 2.7
-        uses: ruby/setup-ruby@v1.218.0
+        uses: ruby/setup-ruby@v1.221.0
         with:
           ruby-version: 2.7
           bundler-cache: true

.github/workflows/ci.yaml

@@ -22,7 +22,7 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@v4.2.2
       - name: Set Up Ruby 3.3.6
-        uses: ruby/setup-ruby@v1.218.0
+        uses: ruby/setup-ruby@v1.221.0
         with:
           ruby-version: 3.3.6
           bundler-cache: true

.github/workflows/demo_site.yml

@@ -23,7 +23,7 @@ jobs:
           repository: jekyll/minima
           ref: demo-site
       - name: Set up Ruby 2.7
-        uses: ruby/setup-ruby@v1.218.0
+        uses: ruby/setup-ruby@v1.221.0
         with:
           ruby-version: 2.7
           bundler-cache: true

.github/workflows/jekyll.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4.2.2
       - name: Setup Ruby
-        uses: ruby/setup-ruby@v1.218.0
+        uses: ruby/setup-ruby@v1.221.0
         with:
           ruby-version: '3.3.6' # Not needed with a .ruby-version file
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically