fix: build.yml

Author: MiroKaku

.github/workflows/build.yaml

@@ -20,6 +20,8 @@ jobs:
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v3
+        with:
+          submodules: true
 
       - name: build nuspec
         if: contains(github.ref, 'tags/')