docs: correct type name in editMenuItems client component example (#15904)

The `editMenuItems` client component example in
`docs/custom-components/edit-view.mdx` referenced a non-existent type
`EditViewMenuItemClientProps`. The correct exported type is
`EditMenuItemsClientProps`.

## Changes

- **`docs/custom-components/edit-view.mdx`**: Replace
`EditViewMenuItemClientProps` → `EditMenuItemsClientProps` in the client
component code example (import and props type annotation)

The server component example already correctly used
`EditMenuItemsServerProps`; the client example now follows the same
naming pattern:

```tsx
import type { EditMenuItemsClientProps } from 'payload'

export const EditMenuItems = (props: EditMenuItemsClientProps) => {
  // ...
}
```

<!-- START COPILOT ORIGINAL PROMPT -->



<details>

<summary>Original prompt</summary>

> 
> ----
> 
> *This section details on the original issue you should resolve*
> 
> <issue_title>Change EditViewMenuItemClientProps to
EditViewMenuItemsClientProps</issue_title>
> <issue_description># Documentation Issue
> 
> The code example at _Edit View > Custom Components > editMenuItems >
Client Component_ refers to a type "`EditViewMenuItemClientProps`"
twice. This type doesn't exist, it should be
`EditViewMenuItem**s**ClientProps`.
> 
> ```tsx
> 'use client'
> 
> import React from 'react'
> import { PopupList } from '@payloadcms/ui'
> 
> import type { EditViewMenuItemClientProps } from 'payload'
> 
> export const EditMenuItems = (props: EditViewMenuItemClientProps) => {
>   const handleClick = () => {
>     console.log('Custom button clicked!')
>   }
> 
>   return (
>     <PopupList.ButtonGroup>
>       <PopupList.Button onClick={handleClick}>
>         Custom Edit Menu Item
>       </PopupList.Button>
>       <PopupList.Button onClick={handleClick}>
>         Another Custom Edit Menu Item - add as many as you need!
>       </PopupList.Button>
>     </PopupList.ButtonGroup>
>   )
> }
> ```
> 
> The server component gets it right.</issue_description>
> 
> ## Comments on the Issue (you are @copilot in this section)
> 
> <comments>
> </comments>
> 


</details>



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- Fixes payloadcms/payload#15898

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: GermanJablo <43938777+GermanJablo@users.noreply.github.com>