Remove submodule usage in CI

Author: osbre

.github/workflows/ci.yml

@@ -12,13 +12,10 @@ jobs:
     steps:
       - name: Download source
         uses: actions/checkout@v4
-        with:
-          submodules: recursive
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable
       - name: Build C bindings
-        run: cargo build --release
-        working-directory: css-inline/bindings/c
+        run: make
       - name: Install Crystal
         uses: crystal-lang/install-crystal@v1
       - name: Run tests