Update check-pkgdown action

Author: stitam

.github/workflows/check-pkgdown.yml

@@ -1,3 +1,5 @@
+# based on https://docs.ropensci.org/rotemplate/
+
 on:
     push:
       branches:
@@ -9,25 +11,7 @@ on:
 name: check-pkgdown
 
 jobs:
-    check_pkgdown:
-      runs-on: ubuntu-22.04
-
-      env:
-        GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
-
-      steps:
-        - uses: actions/checkout@v4
-        - uses: r-lib/actions/setup-r@v2
-          with:
-            r-version: 'release'
-        - uses: r-lib/actions/setup-r-dependencies@v2
-          with:
-            extra-packages: any::devtools, any::pkgdown
-
-        - name: Install dependencies
-          run: devtools::install_github("https://github.com/ropensci-org/rotemplate")
-          shell: Rscript {0}
-
-        - name: Check pkgdown
-          run: pkgdown::check_pkgdown()
-          shell: Rscript {0}
+  check_pkgdown:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: ropensci-org/rotemplate@main