Remove cname input to deploy-book workflow

Author: brian-rose

.github/workflows/publish-site.yaml

@@ -48,5 +48,4 @@ jobs:
     needs: build
     uses: ProjectPythia/cookbook-actions/.github/workflows/deploy-book.yaml@main
     with:
-      cname: projectpythia.org
       publish_dir: 'portal/_build/html'

.github/workflows/trigger-preview.yaml

@@ -19,7 +19,6 @@ jobs:
       artifact_name: book-zip-${{ needs.find-pull-request.outputs.number }}
       destination_dir: _preview/${{ needs.find-pull-request.outputs.number }}  # deploy to subdirectory labeled with PR number
       is_preview: 'true'
-      cname: projectpythia.org
       publish_dir: 'portal/_build/html'
 
   preview-comment: