add explicit key prop to JSX element

[ScottDalessandro]

Please check Issue

Test Plan

On a new epic stack instance, visit and click the new note page visiting /users/:username/notes/new and the browser console should be empty with errors:

Checklist

• Tests updated: No
• Docs updated: No

Screenshots

Before (when creating a new note)

After:

[updbqn]

I think conform expects us to use the key from field for everything to work correctly.

See e.g. edmundhung/conform#600 (comment)

[ScottDalessandro]

Nice find, thanks! So the option here is to ignore them. I'll try to make a demo production version of this. I'd presume React would suppress these errors in production and we'll only have to deal with them in dev environments.