Use `r-lib/actions/examples/pkgdown-pak.yaml`

.github/workflows/pkgdown.yaml

+# Workflow derived from https://github.com/r-lib/actions/tree/master/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
 on:
   push:
-    branches:
-     - main
-     - rc-**
-     - docs/**
-  pull_request:
-    branches:
-     - main
+    branches: [main, master]
+    tags: ['*']
 
 name: pkgdown
 
 jobs:
   pkgdown:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - uses: actions/checkout@v2
 
+      - uses: r-lib/actions/setup-pandoc@v1
+
       - uses: r-lib/actions/setup-r@v1
-        id: install-r
         with:
           use-public-rspm: true
 
-      - uses: r-lib/actions/setup-pandoc@v1
-
       - uses: r-lib/actions/setup-r-dependencies@v1
         with:
+          extra-packages: pkgdown
           needs: website
 
-      - name: Build Site
-        shell: Rscript {0}
+      - name: Deploy package
         run: |
-          pkgdown::build_site(new_process = FALSE)
-
-      - name: Set environment variable $GIT_BRANCH_NAME
-        id: git-branch-name
-        uses: EthanSK/git-branch-name-action@v1
-
-      - name: Deploy to Netlify
-        if: github.event_name == 'push'
-        id: netlify-deploy
-        uses: nwtgck/actions-netlify@v1.1
-        with:
-          publish-dir: 'reference'
-          production-branch: main
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          deploy-message:
-            'Deploy from GHA: ${{ github.event.head_commit.message }} (${{ github.sha }})'
-          enable-pull-request-comment: false
-          enable-commit-comment: false
-          enable-commit-status: true
-          alias: deploy-preview-${{ env.GIT_BRANCH_NAME }}
-        env:
-          NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
-          NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}
+          git config --local user.name "$GITHUB_ACTOR"
+          git config --local user.email "$GITHUB_ACTOR@users.noreply.github.com"
+          Rscript -e 'pkgdown::deploy_to_branch(new_process = FALSE)'