Update CI.yml

Author: fancaiyu

.github/workflows/CI.yml

@@ -37,7 +37,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install ../MCintrgration.py
+          pip install .
           pip install coverage
           pip install pytest pytest-cov
           pip install -r requirements.txt