sphinx-rtd-theme is added to python publish

.github/workflows/python-publish.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 pytest
+        pip install flake8 pytest sphinx sphinx-rtd-theme
         pip install -r requirements.txt
         pip install build
     - name: Lint with flake8