Fix create-release action

Author: iovxw

.github/workflows/github-release.yml

@@ -48,6 +48,8 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v2
+      with:
+        submodules: true
     - name: Install Rust
       uses: hecrj/setup-rust-action@v1
       with: