Fix website workflow permissions issue

- Change from global to local installation of marked
- Use npx to run locally installed marked package
- Fixes EACCES permission error in GitHub Actions

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: super3

.github/workflows/website.yml

@@ -134,8 +134,8 @@ jobs:
           EOF
 
           # Convert README.md to HTML (skip the title and first badges since we have custom hero)
-          npm install -g marked
-          tail -n +9 README.md | marked >> _site/index.html
+          npm install marked
+          tail -n +9 README.md | npx marked >> _site/index.html
 
           cat >> _site/index.html << 'EOF'
               </article>