مشکل با packagecloud

[fakhamatia]

توی apt نمیتونه این ریپوزیتوری رو آپدیت کنه چه دلیلی ممکنه داشته باشه؟ خود سایتش توی مرورگر کار میکنه بدون مشکل این روش برای docker و nvidia و virtualbox و mongodb و.... جواب میده. برای نصب GitHub Desktop

$ sudo apt update 
Err:15 https://packagecloud.io/shiftkey/desktop/any any InRelease                     
  403  Forbidden [IP: 13.224.98.119 443]
Reading package lists... Done
E: Failed to fetch https://packagecloud.io/shiftkey/desktop/any/dists/any/InRelease  403  Forbidden [IP: 13.224.98.119 443]
E: The repository 'https://packagecloud.io/shiftkey/desktop/any any InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

/etc/apt/apt.conf.d/proxy.conf

Acquire::http::Proxy::download.docker.com "http://fodev.org:8118/";
Acquire::http::Proxy::download.virtualbox.org "http://fodev.org:8118/";
Acquire::http::Proxy::downloads.metasploit.com "http://fodev.org:8118/";
Acquire::http::Proxy::repo.mysql.com "http://fodev.org:8118/";
Acquire::http::Proxy::developer.download.nvidia.com "http://fodev.org:8118/";
Acquire::http::Proxy::repo.download.nvidia.com "http://fodev.org:8118/";
Acquire::http::Proxy::repo.mongodb.org "http://fodev.org:8118/";
Acquire::http::Proxy::deb.nodesource.com "http://fodev.org:8118/";
Acquire::http::Proxy::repo.fortinet.com "http://fodev.org:8118/";
Acquire::http::Proxy::deb.anydesk.com "http://fodev.org:8118/";
Acquire::http::Proxy::packagecloud.io "http://fodev.org:8118/";

[behdad222]

نمیدونم!