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

https://github.com/pascal-huber/void-packages powertop
https://github.com/void-linux/void-packages/pull/41421

powertop: fix update-check
As the project moved to GitHub, no `update` file is needed anymore.

A patch file from https://github.com/void-linux/void-packages/pull/41421.patch is attached