www/gohugo: update to 0.121.2

ChangeLog: https://github.com/gohugoio/hugo/releases/tag/v0.121.2

• build(deps): bump golang.org/x/crypto from 0.16.0 to 0.17.0
• tpl/math: Add math.Rand template function e
• resources/images: Create AutoOrient image filter
• all: Remove unused code

Approved by: doceng (implicit)