[Radio Button] Add supporting image for "none" option

[Kritvi-bhatia17]

Acceptance criteria

Under the Radio buttons's Behavior section, now that we've added this copy explaining the "none" or "other" option for deselecting a previously selected item, we could improve the context by updating or adding different images to better illustrate this change.

[laurenmrice]

Closing, as the written explanation is enough to give context to the user that they can supply a "none" option.