Add libclang to release workflow

Author: JohnDowson

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
           - target: x86_64-apple-darwin
             archive: zip
     steps:
-      - run: sudo apt-get install -y libasound2 libasound2-dev libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev libxkbcommon-dev libssl-dev
+      - run: sudo apt-get install -y libasound2 libasound2-dev libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev libxkbcommon-dev libssl-dev libclang-11-dev
       - uses: actions/checkout@master
       - name: Compile and release
         uses: rust-build/rust-build.action@v1.4.4