zsh: osx plugin is renamed to macos

[Kyu]

I'm Submitting a ...

[ ] Bug report
[x] Tool/language/etc documentation request

Bug Location

https://sourabhbajaj.com/mac-setup/iTerm/zsh.html

Tool/Language/etc

zsh link: https://github.com/ohmyzsh/ohmyzsh/wiki/Plugins#removed

Other Information