using pipenv shell instead of pipenv run

.github/workflows/deploy-docs.yml

@@ -18,15 +18,20 @@ jobs:
       with:
         python-version: '3.9'  # Specify the Python version you need
 
-    - name: Install dependencies and build docs
+    - name: Install dependencies
       env:
         PIPENV_VENV_IN_PROJECT: true
       run: |
         python -m pip install --upgrade pip
         pip install pipenv
         pipenv install -d
-        pipenv run pandoc -s readme.md -o docs/readme.rst
-        pipenv run sphinx-build -M html docs/ docs/_build
+        pipenv run pip-chill 
+
+    - name: Build documentation
+      run: |
+        pipenv shell
+        pandoc -s readme.md -o docs/readme.rst
+        sphinx-build -M html docs/ docs/_build
 
     - name: Deploy to GitHub Pages
       uses: peaceiris/actions-gh-pages@v3