Radio Accordion does not close

In the Spectre.css docs there are three radio accordions grouped together and only one is ever expanded at a time. This is not the case on the Storybook example.

This might just be an issue on the storybook page.

https://picturepan2.github.io/spectre/components.html#accordions

Start with the Storybook example for the radio accordion and compare its behavior with the Spectre.css documentation example at the linked URL. Trace the Storybook story and the accordion component to determine where the grouping behavior differs. Done means only one accordion remains expanded at a time, matching the documentation example.

Written by the indexing model from the issue text.