Update pkgdown Actions workflow

.github/workflows/pkgdown.yaml

@@ -1,5 +1,3 @@
-# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
-# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
 on:
   workflow_dispatch:
   pull_request:
@@ -18,18 +16,7 @@ jobs:
     needs: prepare-ptaxsim
     runs-on: ubuntu-latest
     env:
-      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
       PTAXSIM_DB_PATH: ${{ github.workspace }}/ptaxsim.db
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    concurrency:
-      group: pkgdown-${{ github.event_name != 'pull_request' || github.run_id }}
-      cancel-in-progress: false
-    permissions:
-      contents: read
-      pages: write
-      id-token: write
     steps:
       - uses: actions/checkout@v3
 
@@ -61,6 +48,17 @@ jobs:
         run: pkgdown::build_site_github_pages(new_process = FALSE, install = FALSE)
         shell: Rscript {0}
 
+  deploy:
+    needs: pkgdown
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+    steps:
       - name: Configure pages
         uses: actions/configure-pages@v3
 
@@ -72,3 +70,4 @@ jobs:
       - name: Deploy to GitHub Pages
         id: deployment
         uses: actions/deploy-pages@v2
+        if: contains(fromJSON('["main", "master"]'), github.ref_name) && github.event_name != 'pull_request'