menuinst cross platform now?

[jacobwilliams]

Checklist

• [X] I added a descriptive title
• [X] I searched open reports and couldn't find a duplicate

What happened?

This page: https://docs.conda.io/projects/conda-build/en/latest/resources/add-win-start-menu-items.html

Says menuinst only supports Windows, but that's no longer true. According to the https://github.com/conda/menuinst docs, it's cross platform now.

Additional Context

No response