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

Skarnet update
https://github.com/void-linux/void-packages/pull/43583

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

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- Update to skarnet packages and manpages.
- A new package for s6-rc-man-pages is added and the man pages repos are now hosted on sourcehut, so homepage and distfiles are changed.

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#### New package
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