Fix cargo-script install

.github/workflows/benchmarks.yml

@@ -129,7 +129,7 @@ jobs:
           sudo apt install -y git clang curl libssl-dev llvm libudev-dev cmake wabt protobuf-compiler wget bzip2
           curl -o wasm-opt-linux-x64.tar.gz -L `curl -s https://api.github.com/repos/WebAssembly/binaryen/releases/latest | jq -r '.assets[] | select(.name | contains("x86_64-linux")) | .browser_download_url' |grep -v sha256`
           tar xzf wasm-opt-linux-x64.tar.gz && sudo mv binaryen-version_*/bin/* /usr/local/bin/
-          cargo add cargo-script
+          cargo install cargo-script
           wasm-opt --version
 
       - name: Run all benchmarks