Docs do not use consistent capitalization of our product components and other popular terms

[barriebyron]

To achieve a consistent voice to present a trusted and canonical use of terminology and product references, we want our technical content to use standard capitalization and spelling, especially with how we refer to product components and other terms.

We have various inconsistent references to many terms, including:

• node operator (not Node Operator)
• archive node (not Archive Node)
• GitHub (not Github)... oooh we have so many of these mentions
• and so on

A separate effort updates the word list and terminology in the Docs Style Guide > Word List