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

qt6ct: update to 0.8
https://github.com/void-linux/void-packages/pull/43133

Description:
#### Testing the changes
- I tested the changes in this PR: **YES**

#### Local build testing
- I built this PR locally for my native architecture, (x86_64)

I noticed that there is some discussion about the need of qt6ct.sh. I am merely updating qt6ct in this commit but if a conclusion is arrived at in #40619 I can modify this PR.