Updating MySQL - Linux
From 2022, MySQL has changed the keys for the repository, which will cause updates to mysql to fail.
This also applies to systems on which the MySQL client is installed.
Fix - CentOS
wget https://repo.mysql.com/RPM-GPG-KEY-mysql-2022 rpm --import RPM-GPG-KEY-mysql-2022 rm -f RPM-GPG-KEY-mysql-2022
Then run the dnf or yum update again.
Fix - Debian
wget https://repo.mysql.com/RPM-GPG-KEY-mysql-2022 apt-key add RPM-GPG-KEY-mysql-2022 rm -f RPM-GPG-KEY-mysql-2022
Then run the apt update again.