Update ci-cd.yml

Author: Dreamsorcerer

.github/workflows/ci-cd.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Build site
         run: pelican -D -s publishconf.py
       - name: Build Pygments CSS
-        run: pygmentize -f html -a .highlight > output/theme/css/pygment.css
+        run: pygmentize -S default -f html -a .highlight > output/theme/css/pygment.css
       - name: Setup Pages
         uses: actions/configure-pages@v5
       - name: Upload artifact