[CI] Add Git Submodule Initialization to CI Workflow

- Included a step to initialize and update git submodules recursively in the CI workflow.
- This change ensures that all necessary submodules are available during the format check process, improving build reliability.

Author: LeiWang1999

.github/workflows/ci.yml

@@ -47,6 +47,7 @@ jobs:
     - name: Run format check
       run: |
         source "${{ runner.tool_cache }}/${{ env.VENV_DIR }}/bin/activate"
+        git submodule update --init --recursive
         mkdir -p build
         # run cmake to create the build directory with compile_commands.json
         cd build; cmake .. -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DUSE_CUDA=ON; cd ..