New review comment by klarasm on void-packages repository

https://github.com/void-linux/void-packages/pull/44311#discussion_r1273272421

Comment:
Naming it major version was probably a bad choice on my part. Upstream names the directory to A.B. Previously `${version%.*}` was used (the non-greedy variant) which works if version is A.B.C but not A.B. The greedy variant will always return A.

I'm aware my suggestion is a bit ugly but did not find a way to do it with bash substitution. Would it be better to do something like
```
_majorver=1.21
version="${_majorver}.1"
```