我正在安装更新，sudo apt-get update但收到以下错误：
Err:8 https://packagecloud.io/shiftkey/desktop/any any InRelease
429 Too Many Requests [IP: 54.215.161.51 443]
Reading package lists... Done
W: Failed to fetch https://packagecloud.io/shiftkey/desktop/any/dists/any/InRelease 429 Too Many Requests [IP: 54.215.161.51 443]
W: Some index files failed to download. They have been ignored, or old ones used instead.