Screen readers read out object code when using useMultipleSelection hook

- `downshift` version: ^7.6.0 ( but bug also occurs on your example page via your docs )
- `node` version: ^18
- `npm` (or `yarn`) version: ^9

**Relevant code or config**

But if present here in your docs so I have only included this:

https://www.downshift-js.com/use-multiple-selection/

**What you did**:

- Using a screen reader
- Remove one of the items

We are using the `removeSelectedItem` function which is causing this screen reader issue I believe

**What happened**:

You will hear, "[object, object] has been removed"

**Problem description**:

Screen readers are reading out code

**Suggested solution**:

I'm not sure sorry