There's a merged pull request on the void-packages repository

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

Description:
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