MegaMenu: items must be MenuItem[][]. MenuItem[] does not work

[pburrows]

Describe the bug

The error "Uncaught TypeError: items.forEach is not a function" is displayed in MegaMenu when the items property is an array of MenuItem objects.

If you make it an array of arrays, it works as expected.

The documentation clearly shows that items can be either an array Or an array of arrays:
https://primereact.org/megamenu/#api.MenuItem.props.items

Reproducer

https://stackblitz.com/edit/npktaj?file=src%2FApp.jsx

PrimeReact version

latest

React version

17.x

Language

TypeScript

Build / Runtime

Create React App (CRA)

Browser(s)

No response

Steps to reproduce the behavior

set items property of a megamenu item to be a single array, such as:

 {
      label: 'Furniture',
      icon: 'pi pi-box',
      items: [
        { label: 'Accessories' },
        { label: 'Armchair' },
        { label: 'Coffee Table' },
        { label: 'Couch' },
        { label: 'TV Stand' },
      ],
    },

Expected behavior

The single array of menuitems should render