A massive supply chain attack targeting the Arch User Repository (AUR) has compromised more than 400 community-maintained packages, with attackers injecting malicious build scripts designed to deploy credential-stealing malware and rootkit-style payloads on affected Linux systems.
Probably not. The article says that most of it seems to have come from orphaned stuff in the AUR that the threat actors took ownership of via the legit process, then modified to pull down malicious NPM packages when someone went to install them.
So if your Discord package is well maintained you probably have nothing to worry about.