attempted fix of sphinx in actions

Author: ricfog

.github/workflows/documentation.yml

@@ -20,9 +20,7 @@ jobs:
 
     steps:
       - name: Checkout the branch
-        uses: actions/checkout@v2.3.1
-        with:
-          persist-credentials: false
+        uses: actions/checkout@v2
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2
@@ -34,15 +32,18 @@ jobs:
         with:
           version: 1.2.2
           virtualenvs-create: true
-          virtualenvs-in-project: false
+          virtualenvs-in-project: true  # Change to true for a local venv
           installer-parallel: true
 
       - name: Install dependencies
         run: |
           poetry install --all-extras
           sudo apt-get update && sudo apt-get install -y pandoc
-          pip install pandoc
-          poetry add sphinx
+          poetry run pip install pandoc  # Ensure it's installed in Poetry's venv
+
+      - name: Check if Sphinx is installed
+        run: |
+          poetry run sphinx-build --version
 
       - name: Build the documentation with Sphinx
         run: |