replaced hard-coded children with :has(ul)

[jfoxx]

Description

Fixes issue: 107
#107

The main nav shows one dropdown item that is hardcoded in the CSS to only allow the second child to have a dropdown. By changing the selector to :has(ul) it shows the dropdown for any nav item that has children

Related Issue

#107

Motivation and Context

The main nav can only have one dropdown as it is, that is the second child. This fixes it so any item can have a dropdown.

How Has This Been Tested?

I tested only on my own instance with a site derived from this template.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.