Fix GitHub Pages 404 by setting Jekyll production environment

The home page was returning 404 because Jekyll was building in development mode,
causing URL configuration issues. Setting JEKYLL_ENV=production ensures proper
production URLs are generated for GitHub Pages deployment.

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

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

Author: SteveMacenski

.github/workflows/build-docs.yml

@@ -63,7 +63,7 @@ jobs:
       - name: Build Jekyll site
         run: |
           echo "Building Jekyll site..."
-          bundle exec jekyll build --verbose
+          JEKYLL_ENV=production bundle exec jekyll build --verbose
           echo "Jekyll build completed"
       
       - name: Setup Pages