Wait 60s for GitHub Pages to propagate before running Lighthouse

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: petrsvihlik

.github/workflows/lighthouse.yml

@@ -10,6 +10,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+    - name: Wait for GitHub Pages to propagate
+      run: sleep 60
     - name: Audit URLs using Lighthouse
       uses: treosh/lighthouse-ci-action@v12
       with: