www/gohugo: Update to 0.38.1

Change log:

• Fix livereload for the home page bundle
• Fix empty BuildDate in "hugo version"
• Fix some livereload content regressions
• Update github.com/bep/gitmap to fix snap build
• Fix two tests that are broken on Windows
• Add bash completion
• Handle mass content etc. edits in server mode

PR: 227331
Submitted by: ben.lavery@hashbang0.com <ben.lavery@hashbang0.com> (maintainer)