Merge pull request #169 from rolfsimoes/vignettes

Fix automatic deployment

.github/workflows/pkgdown.yaml

@@ -2,9 +2,7 @@
 # Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
 on:
   push:
-    branches: [main, master]
-  pull_request:
-    branches: [main, master]
+    branches: [vignettes]
   release:
     types: [published]
   workflow_dispatch: