Crystal repo has changed - killed the update function apt-get update/yunohost tools upgrade

My YunoHost server

Hardware: - RPi 3b+
YunoHost version: 4.1.8 stabel
I have access to my server : Through SSH | through the webadmin
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no
If yes, please explain:

Description of my issue

Hello,
I wanted to upgrade my instance via the webgui but I failed. It also failed via the terminal command “sudo apt-get update”. After searching, I found out that Crystal change the location of the repo - Bintray will be gone at the end of April · Issue #10626 · crystal-lang/crystal · GitHub, but that is not updated via the apt-get update command?

Unable to update the cache of APT (Debian's package manager). Here is a dump of the sources.list lines, which might help identify problematic lines:
sources.list:deb http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi
sources.list:deb-src http://raspbian.raspberrypi.org/raspbian/ buster main contrib non-free rpi
sources.list.d/yunohost.list:deb http://forge.yunohost.org/debian/ buster stable
sources.list.d/raspi.list:deb http://archive.raspberrypi.org/debian/ buster main
sources.list.d/crystal.list:deb https://dl.bintray.com/crystal/deb all stable

E: The repository 'https://dl.bintray.com/crystal/deb all InRelease' is no longer signed.

E: Failed to fetch https://dl.bintray.com/crystal/deb/dists/all/InRelease 403 Forbidden [IP: 18.196.33.98 443]

Fetching available upgrades for system packages...

OUTPUT From:
sudo apt-get update
Get:1 http://archive.raspberrypi.org/debian buster InRelease [32.7 kB]
Get:2 http://raspbian.raspberrypi.org/raspbian buster InRelease [15.0 kB]
Hit:3 http://forge.yunohost.org/debian buster InRelease
Err:4 https://dl.bintray.com/crystal/deb all InRelease
  403  Forbidden [IP: 3.127.93.119 443]
Reading package lists... Done
E: Failed to fetch https://dl.bintray.com/crystal/deb/dists/all/InRelease  403  Forbidden [IP: 3.127.93.119 443]
E: The repository 'https://dl.bintray.com/crystal/deb all InRelease' is no longer 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.

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