Update dependency installation path in Sphinx workflow

Author: koerper

.github/workflows/sphinx.yml

@@ -18,8 +18,8 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -e ./src
           pip install -r ./requirements.txt
+          pip install -e .
       - name: Build HTML
         uses: ammaraskar/sphinx-action@master
       - name: Upload artifacts