textproc/gspell: Fix portscout configuration
It is the 2-nd (minor), not the 1-st (major) part of version number,
that should be even. And limitw: key is 1-based, rather than 0-based,
so it's the (number+1)th version component that will be limited by it.
https://portscout.freebsd.org/info/portscout-portconfig.txt
PR: 258533
Reported by: zi
Approved by: gnome (maintainer-timeout)