text: delimit string elements in Arrays w/newlines

[#46753911]

Individual elements in text content defined as an
Array of strings will no longer be interpreted as
paragraphs.

Instead newlines will be used as delimiters before
passing to the MarkDown formatter.
update text content in About and text components

[#46753911]

- remove HTML used in About content
- replace with Markdown
- insert string elements: "", to make paragraphs