try to use pip instead

.github/workflows/documentation.yml

@@ -39,8 +39,10 @@ jobs:
 
       - name: Build the documentation with Sphinx
         run: |
-          poetry install --all-extras
+          # poetry install --all-extras
+          pip install ".[docs]"
           sudo apt install pandoc
           pip install pandoc
           cd docs
-          poetry run sphinx-build -b html source build/html
+          # poetry run sphinx-build -b html source build/html
+          sphinx-build -b html source build/html