Update ruby/setup-ruby in jekyll.yml

Author: hmellor

.github/workflows/jekyll.yml

@@ -34,10 +34,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup Ruby
-        # https://github.com/ruby/setup-ruby/releases/tag/v1.207.0
-        uses: ruby/setup-ruby@4a9ddd6f338a97768b8006bf671dfbad383215f4
+        # https://github.com/ruby/setup-ruby/releases/tag/v1.218.0
+        uses: ruby/setup-ruby@d781c1b4ed31764801bfae177617bb0446f5ef8d
         with:
-          ruby-version: '3.1' # Not needed with a .ruby-version file
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
           cache-version: 0 # Increment this number if you need to re-download cached gems
       - name: Setup Pages