Invalid Signature Ubuntu 20.04

[bullionbob]

Describe the bug
Receive an Invalid Signature error when attempting to install from the Downloads page.

To Reproduce
Run the following commands

echo 'deb http://download.opensuse.org/repositories/home:/ungoogled_chromium/Ubuntu_Focal/ /' | sudo tee /etc/apt/sources.list.d/home-ungoogled_chromium.list > /dev/null
 curl -s 'https://download.opensuse.org/repositories/home:/ungoogled_chromium/Ubuntu_Focal/Release.key' | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/home-ungoogled_chromium.gpg > /dev/null
 sudo apt update

Expected behavior
The repository to be updated with ungoogled-chromium

Environment (please complete the following information):
OS: Ubuntu 20.04.5 LTS
Kernel: 5.15.0-48-generic

Error
Err:8 http://download.opensuse.org/repositories/home:/ungoogled_chromium/Ubuntu_Focal InRelease The following signatures were invalid: EXPKEYSIG 02456C79B2FD48BF home:ungoogled_chromium OBS Project <home:[email protected]> Reading package lists... Done W: GPG error: http://download.opensuse.org/repositories/home:/ungoogled_chromium/Ubuntu_Focal InRelease: The following signatures were invalid: EXPKEYSIG 02456C79B2FD48BF home:ungoogled_chromium OBS Project <home:[email protected]> E: The repository 'http://download.opensuse.org/repositories/home:/ungoogled_chromium/Ubuntu_Focal 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.
After sudo apt update

[networkException]

Duplicate of ungoogled-software/ungoogled-chromium-debian#307