use actions/deploy-pages

.github/workflows/github-pages.yml

@@ -4,20 +4,15 @@ on:
     branches: [main]
 jobs:
   main:
+    permissions:
+      pages: write
+      id-token: write
+    environment: github-pages
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Git config
-        run: |
-          git config user.name bot
-          git config user.email bot@example
-      - name: Build
-        run: |
-          git subtree add --prefix pages origin gh-pages
-          npx @marp-team/marp-cli README.md -o pages/index.html
-      - name: Publish
-        run: |
-          git add -f pages
-          if git commit -m update; then
-            git subtree push --prefix pages origin gh-pages
-          fi
+      - run: npx @marp-team/marp-cli README.md -o pages/index.html
+      - uses: actions/upload-pages-artifact@v1
+        with:
+          path: pages
+      - uses: actions/deploy-pages@v1