fix checkout

.github/workflows/build-check.yml

@@ -5,7 +5,10 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+            submodules: recursive
       - name: Execute Make
         run: |
             if ! docker compose run --rm ner-gcc-arm make -j `nproc`; then