Change publish_dir option in build-site.yml

Author: NickleDave

.github/workflows/build-site.yml

@@ -23,5 +23,5 @@ jobs:
         with:
           publish_branch: gh-pages
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: _build/
+          publish_dir: docs/_build/html
           force_orphan: true