Bundle install before building

Author: RosemaryOrchard

.github/workflows/jekyll.yml

@@ -45,7 +45,7 @@ jobs:
         uses: actions/configure-pages@v5
       - name: Build with Jekyll
         # Outputs to the './_site' directory by default
-        run: bundle exec jekyll build
+        run: bundle install && bundle exec jekyll build
         env:
           JEKYLL_ENV: production
       - name: Upload artifact