fix : CI pkgdown

Author: MurielleDelmotte

.github/workflows/pkgdown.yaml

@@ -41,3 +41,9 @@ jobs:
         shell: Rscript {0}
 
       - name: Deploy to GitHub pages 
+        if: github.event_name != 'pull_request'
+        uses: JamesIves/[email protected]
+        with:
+          clean: false
+          branch: gh-pages
+          folder: docs