Push built artifact to pages branch instead of GH Pages.

Author: whitequark

.github/workflows/main.yaml

@@ -19,20 +19,27 @@ jobs:
           npm ci
           npm run minify
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
+          name: pages
           path: dist/
 
-  deploy-dev:
+  deploy:
     permissions:
-      pages: write
-      id-token: write
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
+      contents: write
     runs-on: ubuntu-latest
     needs: build
     steps:
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4
+      - name: Check out source code
+        uses: actions/checkout@v4
+        with:
+          ref: pages
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: pages
+          path: .
+      - name: Commit changes
+        uses: stefanzweifel/git-auto-commit-action@v6
+        with:
+          commit_message: "Deploy website."