Update documentation around additional info guidance

[allison0034]

Duplicate check

• I've searched for any related issues and avoided creating a duplicate issue.

This update is for:

Component

What is the name?

Additional info

What is the nature of this update?

• How to build this component/pattern
• When to use this component/pattern
• When to use something else
• Usability guidance
• Accessibility considerations
• Content considerations
• Implementation
• Package information
• Addition to Forms Library documentation
• Update to existing Forms Library documentation

What problem does this solve?

We have noticed a lot of designers misuse the additional info component and try to put too much content in it. The content is supposed to be limited since this component was created to be near inputs typically on forms. When it is expanded the input is pushed down the page and the user must close the component to see the input again.

I typically flag these at Staging reviews. The one I recently flagged worked with CAIA and found a loop hole stating that "since it was discussed with CAIA that the way the additional info component is being used in forms (at the end of the page), length wouldn't be an issue". We may want to look into this and see if we need to add more guidance.

Additional Context

No response