There is an updated pull request by mdkcore0 against master on the void-packages repository

https://github.com/mdkcore0/void-packages slack-desktop
https://github.com/void-linux/void-packages/pull/50131

slack-desktop: update to 4.38.125
#### Testing the changes
- I tested the changes in this PR: **briefly**

#### Local build testing
- I built this PR locally for my native architecture: x86_64-libc

A patch file from https://github.com/void-linux/void-packages/pull/50131.patch is attached