try local per https://github.com/r-lib/actions/tree/v2/setup-r-dependencies#installing-the-local-package

Author: kuriwaki

.github/workflows/R-CMD-check-dev.yaml

@@ -42,6 +42,8 @@ jobs:
         shell: Rscript {0}
 
       - name: Test live dataverse (vignette)
+        with:
+          extra-packages: any::pkgdown, local::.
         run: |
           source("tests/B-search_ghaction.R")
           source("tests/C-download_ghaction.R")