www/gohugo: Update to 0.121.1

Changelog:
https://github.com/gohugoio/hugo/releases/tag/v0.121.1
https://github.com/gohugoio/hugo/releases/tag/v0.121.0
https://github.com/gohugoio/hugo/releases/tag/v0.120.4

Reported by: Mark Phillips
Approved by: doceng (implicit)