Fix aarch64

Author: CppCXY

.github/workflows/build.yml

@@ -49,6 +49,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y gcc-aarch64-linux-gnu libc6-dev-arm64-cross g++-aarch64-linux-gnu
+          rustup target add ${{ matrix.target }}
           cargo build --release --target ${{ matrix.target }} --target-dir target/${{ matrix.platform }}