Update compile_nuttx.yml

Fix submodule usage in CI.

.github/workflows/compile_nuttx.yml

@@ -24,6 +24,5 @@ jobs:
     - uses: actions/checkout@v1
       with:
         token: ${{ secrets.ACCESS_TOKEN }}
-        submodules: true
     - name: make ${{ matrix.config }}
       run: make ${{ matrix.config }}