audit-avt1-gs-about-carbon: aria-expanded not valid

[andreancardona]

Environment

Operating system: Mac
Browser: Chrome
AVT 1️⃣
Page: Getting Started - About Carbon

Detailed description:

The WAI-ARIA role or attribute 'aria-expanded' is not valid for the element

What to do:

• If a native HTML element fits the intended behavior, use that;

[andreancardona]

PR here (issue found in gatsby theme): carbon-design-system/gatsby-theme-carbon#1064