List Block V2: Prefilled word "list" isn't greyed-out

[thehenrybyrd]

Describe the bug When adding a new list item, the word "List" appears, but isn't greyed-out.

To Reproduce Steps to reproduce the behavior:

1. Make sure you're using Gutenberg 13.8.2, and enable List block v2 in Experiments.
2. Create a new post, and add a list block.
3. Add a few items, noting that each time you add one, the word "List" is prefilled before you start typing. Note that the word "List" is not grey or in any way distinguished from text you have entered.

Expected behavior I expected the prefilled word "List" to be greyed-out, indicating it's not real text.

Screenshots

Smartphone (please complete the following information): Tested on Samsung Galaxy S21, Android 12, WPAndroid 20.5-rc-1