"Criteria" should be "criterion" in many places

[david-a-wheeler]

The singular is "criterion", the plural is "criteria". So when talking about an individual criterion (including in the YAML) it should be "criterion".

[david-a-wheeler]

This isn't a crisis, since some people do use the plural for the singular, but many people don't like it: https://web.mit.edu/21.guide/criteria.htm