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

Signal-Desktop: add support for x86_64-musl
https://github.com/void-linux/void-packages/pull/39038

Description:
#### 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
- I built this PR locally for these architectures (if supported. mark crossbuilds):
  - x86_64-musl (crossbuild)