change deploy mechanism

.github/workflows/bookdown.yml

@@ -7,7 +7,8 @@ on:
       - master
 
 name: booklet
-
+permissions:
+  contents: write
 jobs:
   bookdown:
     name: build-bookdown
@@ -50,39 +51,14 @@ jobs:
           Rscript -e 'bookdown::clean_book(TRUE)'
           Rscript -e 'bookdown::render_book("index.Rmd", quiet = TRUE)'
 
+      - name: Deploy to GitHub Pages
+        uses: JamesIves/github-pages-deploy-action@v4
+        if: github.event_name != 'pull_request'
+        with:
+          branch: gh-pages
+          folder: _book/
+
       - uses: actions/upload-artifact@v4
         with:
           name: _book
           path: _book/
-
-# Need to first create an empty gh-pages branch
-# see https://pkgdown.r-lib.org/reference/deploy_site_github.html
-# and also add secrets for a GH_PAT and EMAIL to the repository
-# gh-action from https://github.com/Cecilapp/GitHub-Pages-deploy
-  checkout-and-deploy:
-    runs-on: ubuntu-latest
-    needs: bookdown
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Download Artifact
-        uses: actions/download-artifact@v4
-        with:
-          # Artifact name
-          name: _book                      # optional
-          # Destination path
-          path: _book                      # optional
-
-      - name: Abbreviate Git SHA
-        run: echo "GITHUB_SHA_SHORT=$(git rev-parse --short $GITHUB_SHA)" >> $GITHUB_ENV
-
-      - name: Deploy to GitHub Pages
-        uses: Cecilapp/GitHub-Pages-deploy@v3
-        if: github.event_name != 'pull_request'
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          email: ${{ secrets.EMAIL }}      # must be a GitHub-verified email
-          build_dir: _book/                # "_site/" by default
-          commit_message: Update book via ${{ env.GITHUB_SHA_SHORT }}