[cognitive] barrier examples could be more descriptive and could link to resources

[lbeaze]

re: https://deploy-preview-113--wai-people-use-web.netlify.app/people-use-web/abilities-barriers-cognitive/

We don't explain how something is a barrier. It's only a list right now.

We could do something similar to the user story pages to give readers a barrier (in a format that describes how this is a problem) and then link to WAI content to remove the barriers.

[JayneSchurick]

@lbeaze This will be discussed as a future improvement.