HttpClient超时时间

1. 建立连接超时时间

var httpClient = new HttpClient(new SocketsHttpHandler() { ConnectTimeout = ... });

2. 响应超时时间

httpClient.TimeOut = ....

https://docs.microsoft.com/en-us/dotnet/api/system.net.http.socketshttphandler.connecttimeout?view=net-6.0
https://github.com/dotnet/runtime/issues/11594