Repository: ui
Issue: [Bug]: <CommandGroup> TypeError: undefined is not iterable (cannot read property Symbol(Symbol.iterator))
Labels: bug

### Describe the bug

It seems that the wrong component was used in the example.

### Affected component/components

Combobox, CommandGroup, CommandList

### How to reproduce

1. Copy Combobox examle 
2. Paste example code in your project

![Screenshot 2024-03-15 at 23 49 51](https://github.com/shadcn-ui/ui/assets/72360450/a3841478-4994-4303-bc74-9bccd3383303)


### Codesandbox/StackBlitz link

https://v5n77l-3000.csb.app/

https://codesandbox.io/p/github/mladenovic-13/combobox-error-sandbox/master?import=true&layout=%257B%2522sidebarPanel%2522%253A%2522GIT%2522%252C%2522rootPanelGroup%2522%253A%257B%2522direction%2522%253A%2522horizontal%2522%252C%2522contentType%2522%253A%2522UNKNOWN%2522%252C%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522id%2522%253A%2522ROOT_LAYOUT%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522UNKNOWN%2522%252C%2522direction%2522%253A%2522vertical%2522%252C%2522id%2522%253A%2522cltt9afw200063b6kfstzctf4%2522%252C%2522sizes%2522%253A%255B70%252C30%255D%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522EDITOR%2522%252C%2522direction%2522%253A%2522horizontal%2522%252C%2522id%2522%253A%2522EDITOR%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522EDITOR%2522%252C%2522id%2522%253A%2522cltt9afw200023b6kwrm5ng8p%2522%257D%255D%257D%252C%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522SHELLS%2522%252C%2522direction%2522%253A%2522horizontal%2522%252C%2522id%2522%253A%2522SHELLS%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522SHELLS%2522%252C%2522id%2522%253A%2522cltt9afw200043b6ks1gl47kx%2522%257D%255D%252C%2522sizes%2522%253A%255B100%255D%257D%255D%257D%252C%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522DEVTOOLS%2522%252C%2522direction%2522%253A%2522vertical%2522%252C%2522id%2522%253A%2522DEVTOOLS%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522DEVTOOLS%2522%252C%2522id%2522%253A%2522cltt9afw200053b6k8dejvnsz%2522%257D%255D%252C%2522sizes%2522%253A%255B100%255D%257D%255D%252C%2522sizes%2522%253A%255B50%252C50%255D%257D%252C%2522tabbedPanels%2522%253A%257B%2522cltt9afw200023b6kwrm5ng8p%2522%253A%257B%2522tabs%2522%253A%255B%257B%2522id%2522%253A%2522cltt9afw200013b6kmehgootn%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522type%2522%253A%2522FILE%2522%252C%2522filepath%2522%253A%2522%252FREADME.md%2522%257D%255D%252C%2522id%2522%253A%2522cltt9afw200023b6kwrm5ng8p%2522%252C%2522activeTabId%2522%253A%2522cltt9afw200013b6kmehgootn%2522%257D%252C%2522cltt9afw200053b6k8dejvnsz%2522%253A%257B%2522id%2522%253A%2522cltt9afw200053b6k8dejvnsz%2522%252C%2522activeTabId%2522%253A%2522cltt9crce00rf3b6kx2mvx6fk%2522%252C%2522tabs%2522%253A%255B%257B%2522type%2522%253A%2522TASK_PORT%2522%252C%2522taskId%2522%253A%2522dev%2522%252C%2522port%2522%253A3000%252C%2522id%2522%253A%2522cltt9crce00rf3b6kx2mvx6fk%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522path%2522%253A%2522%252F%2522%257D%255D%257D%252C%2522cltt9afw200043b6ks1gl47kx%2522%253A%257B%2522id%2522%253A%2522cltt9afw200043b6ks1gl47kx%2522%252C%2522activeTabId%2522%253A%2522cltt9b9kv00ak3b6krzpeqdbf%2522%252C%2522tabs%2522%253A%255B%257B%2522id%2522%253A%2522cltt9afw200033b6kelm924gi%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522type%2522%253A%2522TERMINAL%2522%252C%2522shellId%2522%253A%2522cltt9agi8000tdcf17vteap3t%2522%257D%252C%257B%2522type%2522%253A%2522TASK_LOG%2522%252C%2522taskId%2522%253A%2522CSB_RUN_OUTSIDE_CONTAINER%253D1%2520devcontainer%2520templates%2520apply%2520--template-id%2520%255C%2522ghcr.io%252Fdevcontainers%252Ftemplates%252Ftypescript-node%255C%2522%2520--template-args%2520%27%257B%257D%27%2520--features%2520%27%255B%255D%27%2522%252C%2522id%2522%253A%2522cltt9b7x100503b6kkkxuc6nu%2522%252C%2522mode%2522%253A%2522permanent%2522%257D%252C%257B%2522type%2522%253A%2522TASK_LOG%2522%252C%2522taskId%2522%253A%2522dev%2522%252C%2522id%2522%253A%2522cltt9b9kv00ak3b6krzpeqdbf%2522%252C%2522mode%2522%253A%2522permanent%2522%257D%255D%257D%257D%252C%2522showDevtools%2522%253Atrue%252C%2522showShells%2522%253Atrue%252C%2522showSidebar%2522%253Atrue%252C%2522sidebarPanelSize%2522%253A15%257D

### Logs

_No response_

### System Info

```bash
MacOS, Chrome
```


### Before submitting

- [X] I've made research efforts and searched the documentation
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