check links on pages build

.github/workflows/pages.yml

@@ -69,3 +69,17 @@ jobs:
       - name: Deploy to GitHub Pages
         id: deployment
         uses: actions/deploy-pages@v2
+        
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install linkchecker
+        run: |
+          python -m pip install --upgrade pip
+          pip install linkchecker
+
+      - name: Run linkchecker
+        run: |
+          linkchecker https://aider.chat