[fix] Accordion component fails a11y test when multiselectable is true

[vim-usds]

ReactUSWDS Version & USWDS Version:
ReactUSWDS: 3.1.0
USWDS: 2.13.3

Describe the bug
When setting the prop of multiselectable to true on the Accordion component, it fails the Axe Dev tools a11y check. When no setting this prop, the a11y check passes.

To Reproduce
Steps to reproduce the behavior:

1. Install the Axe dev tools from here
2. Render an Accordion component
3. Enable multiselectable to true
4. Open dev tools
5. Run devAxe on the page and error in screenshots section

Expected behavior
Expecting the component to pass a11y checks when multiselectable is true or false.

Screenshots

Additional context
No

Device and Browser Information (please complete the following information if describing a UI bug):

• Chrome 105