GPG Download instructions are not working

[mrexodia]

In the documentation at https://www.zerotier.com/download/ there is a section about import GPG keys for Debian. It looks like the branch got renamed from master to main, so these instructions do not work.

[monnoval]

Had the same issue just now
Tested in fresh install of Proxmox 8.1 / Debian 12, see part of the error below

gpg: Total number processed: 1
gpg:              unchanged: 1
-bash:  : command not found
gpg: WARNING: no command supplied.  Trying to guess what you mean ...
gpg: Signature made Tue 31 Oct 2023 03:07:38 AM +08
gpg:                using RSA key 74A5E9C458E1A431F1DA57A71657198823E52A61
gpg:                issuer "contact@zerotier.com"
gpg: Good signature from "ZeroTier, Inc. (ZeroTier Support and Release Signing Key) <contact@zerotier.com>" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.