update trigger-site-build

Author: jukent

.github/workflows/trigger-site-build.yaml

@@ -7,5 +7,6 @@ jobs:
     uses: ProjectPythia/cookbook-actions/.github/workflows/build-book.yaml@main
     with:
       artifact_name: book-zip-${{ github.event.number }}
-      base_url: '/${{ github.event.repository.name }}/_preview/${{ github.event.number }}'
+      path_to_notebooks: 'portal'
+      base_url: '/_preview/${{ github.event.number }}'
       # Other input options are possible, see ProjectPythia/cookbook-actions/.github/workflows/build-book.yaml