www/gohugo: Update from 0.25.1 to 0.26

[joneum]

Summary

• www/gohugo: Update from 0.25.1 to 0.26

Change log:

• Use hash for cache key 6cd33f69 @RealOrangeOne
• Add some empty slice tests to intersect
• Support reflinks starting with a slash
• Make template panics into nice error messages
• Make the title case style guide configurable
• Add support for French Guillemets
• Add support for French Guillemets
• Switch from fork bep/inflect to markbates/inflect
• Remove unused dependencies from vendor.json
• Add --debug option to be improved on over time
• Reduce Docker image size from 277MB to 27MB
• Optimize Docker image size
• Add --trace to asciidoctor args
• Add script to pull in docs changes
• Add HasShortcode deccc540
• Improve the twitter card template
• Add GOEXE to support building with different versions of go
• Fix intersect on []interface{} handling
• Fix broken TaskList in Markdown

PR: 221409
Submitted by: [e-mail] (maintainer)
Approved by: xxx (mentor)
#Differential Revision: https://reviews.freebsd.org/Dxxxxx

Test Plan

:~/dev/ports/www/gohugo % portlint -AC
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
0 fatal errors and 1 warning found.

poudriere testport:

10.3-amd64
10.3-i386
11.1-amd64
11.1-i386
12.0-CURRENT r321899 amd64
12.0-CURRENT r321913 i386