chore: change the checkout target for the test

Author: lmxyy

.github/workflows/pr-test.yaml

@@ -36,6 +36,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          submodules: true
       - name: Show current commit
         run: git log -1 --oneline
       - name: Set up Python