add recursive to ci.yml

Author: JasonZhang517

.github/workflows/ci.yml

@@ -17,6 +17,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: 'recursive'
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5