New review comment by classabbyamp on void-packages repository

https://github.com/void-linux/void-packages/pull/38326#discussion_r933625816

Comment:
```suggestion
_release_suffix=${version##*.}
_upstream_version="${version%.${_release_suffix}}-${_release_suffix}"
_upstream_version="${version/.${version##*.}/-${version##*.}}"
```
should work fine as-is but here's an alternative solution :)