fix: 使用 gh-proxy.com 加速 community-inference-backends 克隆，解决 GitHub 连接超时

hack/install.sh

@@ -36,7 +36,7 @@ function make_community_backends() {
   gpustack::log::info "pulling community backends"
 
   # Clone the repository
-  git clone https://github.com/gpustack/community-inference-backends "${tmp_dir}"
+  git clone https://gh-proxy.com/https://github.com/gpustack/community-inference-backends "${tmp_dir}"
 
   # Build the community backends
   (