400+ Arch Linux AUR Packages Compromised in a Supply Chain Attack Deploying Infostealers
(cybersecuritynews.com)
Nah, you're fine the Discord package(https://archlinux.org/packages/extra/x86_64/discord/) is in the official repo and it was not affected at all. The only people who should worry are those using AUR helpers to install packages without checking the PKGBUILD