Fix pages.

.github/workflows/docs.yml

@@ -19,9 +19,33 @@ jobs:
       - name: Build Docs
         run: cd docs && mdbook build
 
+      - name: Build github-page.tar.gz
+        run: tar -czvf github-page.tar.gz -C docs/book . && mkdir -p _site && cp github-page.tar.gz _site/
+
+      - name: Fix permissions
+        run: |
+          chmod -c -R +rX "_site/" | while read line; do
+            echo "::warning title=Invalid file permissions automatically fixed::$line"
+          done
+
+      - name: Upload Pages artifact
+        uses: actions/upload-pages-artifact@v3
+
+  deploy-docs:
+    if: github.ref == 'refs/heads/master'
+    runs-on: ubuntu-latest
+    needs: docs
+
+    permissions:
+      pages: write
+      id-token: write
+
+    environment:
+      # environment created automatically by GitHub
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
       - name: Deploy to GitHub Pages
-        uses: peaceiris/actions-gh-pages@v3
-        if: ${{ github.ref == 'refs/heads/master' }}
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./book
+        id: deployment
+        uses: actions/deploy-pages@v2