Chatbot: Define styles for markdown block quotes and headings

[rebeccaalpert]

We had a request come in for styles for block quotes and headings: patternfly/chatbot#388

We need to know what they should look like! :)

[kaylachumley]

Let's use the content component to inherit the blockquote styling and heading structure! No need for new designs for now https://www.patternfly.org/components/content

[andrew-ronaldson]

Closed as complete