OSX Hugo brew 0.143.1 needs hugo.IsServer instead of .Site.IsServer

[audetcameron]

change
{{ if .Site.IsServer }}
to
{{ if hugo.IsServer }}

on the /partials/head.html due to site no longer working.
https://gohugo.io/methods/site/isserver/

(Fresh install using brew install hugo) installs 0.143.1

-Thanks for the package, I'm just testing out hugo and your tailwind template to get an idea on if I should be building static sites here vs my typical jekyll builds.

[4044ever]

It's kinda outdated. Will eventually change to new Hugo, Tailwind V4 etc...