use actions/deploy-pages

.github/workflows/github-pages.yml

@@ -4,23 +4,20 @@ on:
     branches: [main]
 jobs:
   main:
+    permissions:
+      pages: write
+      id-token: write
+    environment: github-pages
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with: { node-version: lts/*, cache: yarn }
-      - name: Git config
-        run: |
-          git config user.name bot
-          git config user.email bot@example
-          git subtree add --prefix pages origin gh-pages
       - name: Build
         run: |
           yarn install
           yarn build
-      - name: Publish
-        run: |
-          git add -f pages
-          if git commit -m update; then
-            git subtree push --prefix pages origin gh-pages
-          fi
+      - uses: actions/upload-pages-artifact@v1
+        with:
+          path: pages
+      - uses: actions/deploy-pages@v1