CC a11y: publish radio button checklist - draft content

[brunerae]

Summary

Create the gherkins for theusa-radio-button accessibility test checklist items found in the Critical Checklist spreadsheet (Google Doc 🔒).

The process for creating a new accessibility test page can be found in the Creating accessibility checklists - process doc (Google Doc 🔒).

[finekatie]

After check-in today with a11y checklist team, I'll need to have these ready by 9/10 EOD. Team hoping to have out for Sept MC.

[finekatie]

Drafted today. Had one question for Alex before writing one. Waiting for update then will be finished with this task.

[finekatie]

I think my work is done here.

[alex-hull]

@finekatie Moving this into done, since the radio button page was launched last week!