Fix workflow again

.github/workflows/ci.yml

@@ -63,9 +63,14 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.10' 
+
       - name: Install required packages
         run: |
           pip install -r requirements-dev.txt
+          pip install .
 
       - name: unit test
         shell: bash