get submodules too

Author: Jakobzs

.github/workflows/coverage.yml

@@ -10,6 +10,8 @@ jobs:
     steps:
       - name: Check out code
         uses: actions/checkout@v4
+        with:
+          submodules: true
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@master
         with: