fix: Update GitHub Actions workflow for Jekyll site

Author: dominicsayers

.github/workflows/jekyll.yml

@@ -33,10 +33,8 @@ 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
+        uses: ruby/setup-ruby@latest
         with:
-          ruby-version: '3.4.9' # 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