There is a new pull request by Nopey against master on the void-packages repository

https://github.com/Nopey/void-packages discord-update-script
https://github.com/void-linux/void-packages/pull/24377

discord: add update script
This API endpoint is used by the app, and so should be stable.
The app also passes the version, but leaving it out seemingly doesn't cause problems.
ex request: https://discordapp.com/api/updates/stable?platform=linux&version=0.0.10

A patch file from https://github.com/void-linux/void-packages/pull/24377.patch is attached