Checkout code for pypi release

Author: Hanbin Hu

.github/workflows/release.yml

@@ -12,8 +12,6 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v2
-        with:
-          submodules: recursive
       - name: Wrap the examples
         run: |
           bash scripts/wrap_examples.sh
@@ -42,6 +40,10 @@ jobs:
     runs-on: ubuntu-latest
     needs: build
     steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
       - name: Set up Python
         uses: actions/setup-python@v2
         with: