New review comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/33943#discussion_r744347835

Comment:
```suggestion
distfiles="$DEBIAN_SITE/main/s/syncthing-gtk/syncthing-gtk_${version}.orig.tar.xz"
```
With version change to `0.9.4.4+ds+git20201209+c46fbd8`