Fix baseurl value leading to double-ups of the repo path

Author: ultraq

.github/workflows/publish-docs.yml

@@ -24,7 +24,7 @@ jobs:
           bundler-cache: true
           cache-version: 0 # Increment this number if you need to re-download cached gems
       - run: bundle install
-      - run: bundle exec jekyll build --baseurl thymeleaf-layout-dialect
+      - run: bundle exec jekyll build --baseurl ''
       - uses: actions/upload-pages-artifact@v3
         with:
           path: './thymeleaf-layout-dialect-docs/_site'