Check out submodule in CI

Author: sampsyo

.github/workflows/build.yaml

@@ -7,6 +7,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: true
       - uses: actions/setup-node@v5
       - name: Build
         run: npm install && npm run build