Specify docs directory in VitePress build command

Update VitePress build command to specify docs directory.

Author: HerrFuchsX

.github/workflows/deploy.yml

@@ -21,7 +21,7 @@ jobs:
         run: npm ci
 
       - name: Build VitePress site
-        run: npx vitepress build
+        run: npx vitepress build docs
 
       - name: Deploy to GitHub Pages
         uses: peaceiris/actions-gh-pages@v3