Description

This PR suggests fixing the accordion's documentation about how to render it when expanded.

The original sentence was in fact not correct from the beginning as there was no .open class used for the accordions. The correct class is .show, but is not enough to make the accordion expand. The .collapsed class needs to be removed and the aria-expanded attribute needs to be set to true.

This description has been updated to reflect the changes and moved to the "Example" section.

Feel free to enhance this fix directly if you have any suggestions.

Type of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist

• I have read the contributing guidelines
• My code follows the code style of the project (using npm run lint)
• My change introduces changes to the documentation
• I have updated the documentation accordingly
• (N/A) I have added tests to cover my changes
• All new and existing tests passed

Live previews

• https://deploy-preview-39304--twbs-bootstrap.netlify.app/docs/5.3/components/accordion/

Related issues

Closes #39303