added pip install

.github/workflows/sphinx.yml

@@ -32,6 +32,12 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - name: Setup python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+          cache: 'pip' # caching pip dependencies
+      - run: pip install -e .
       - name: Sphinx Build
         uses: ammaraskar/sphinx-action@master
         with: