fixed install

.github/workflows/documentation.yml

@@ -28,9 +28,9 @@ jobs:
       - name: Upgrade pip and install dependencies
         run: |
           python -m pip install --upgrade pip poetry
-          poetry install --no-root
+          poetry install --with dev
       - name: Install pandoc using apt
-        run: sudo apt install pandoc        
+        run: sudo apt install pandoc
       - name: Build documentation
         run: make coverage doctest html
         working-directory: docs