Fixed CI failing due to sys dependency

Author: cheestree

.github/workflows/ci.yml

@@ -60,7 +60,7 @@ jobs:
       - name: Install Rust nightly
         uses: dtolnay/rust-toolchain@nightly
       - name: Run cargo doc
-        run: cargo doc --no-deps --all-features
+        run: sudo apt-get install -y libasound2-dev && cargo doc --no-deps --all-features
         env:
           RUSTDOCFLAGS: --cfg docsrs
   test: