adding more background info

[carriewright11]

Wanted to add more references and some background info about how chatbots work.

[github-actions[bot]]

No spelling errors! :tada: Comment updated at 2023-05-10 with changes from 2d611b53343506f3cc9c2a88b14c6a7d3a64047e

[github-actions[bot]]

No broken urls! :tada: Comment updated at 2023-05-10 with changes from 2d611b53343506f3cc9c2a88b14c6a7d3a64047e

[github-actions[bot]]

Re-rendered previews from the latest commit:

• See preview of Bookdown here
• See preview of Coursera/Leanpub version here
• Download the preview of .docx file

Updated at 2023-05-10 with changes from 2d611b53343506f3cc9c2a88b14c6a7d3a64047e