www/gohugo: update to 0.125.4

Summary:
ChangeLog: https://github.com/gohugoio/hugo/releases/tag/v0.125.4

	   https://github.com/gohugoio/hugo/releases/tag/v0.125.5
	   https://github.com/gohugoio/hugo/releases/tag/v0.125.6

Doc and website seems (under visual inspection) to be built properly.
No new warnings during building AFAICT.

Test Plan:

• Apply patch and run make at the top level doc tree
• Build misc/freebsd-doc-all

PR: 278732
Reviewed by: dbaio@
Differential Revision: https://reviews.freebsd.org/D44939