Add "limited subject-matter experience" to "Long descriptions"

[MakotoUeki]

Long descriptions - Complex Images
https://www.w3.org/WAI/tutorials/images/complex/#long-descriptions

The second paragraph reads:
"Remember that complex images can be difficult to understand by many people – in particular people with learning disabilities and people with low vision. Long descriptions benefit many people, and ..."

The Alt Text subgroup of the Silver Task Force would like to suggest the following wording:
"Many people have difficulty understanding complex images--especially those with low vision, learning disabilities, and limited subject-matter experience."