apt-key

apt update するたびに言われるから対処。

W: https://download.jitsi.org/stable/InRelease: Key is stored in legacy trusted.
gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.

はいな。

wget -qO - https://download.jitsi.org/jitsi-key.gpg.key \
	| tee /etc/apt/trusted.gpg.d/jitsi.gpg