Minor Consistency Issue in Section Titles

[jonopoltrack]

Part One: About the Experience API -- Does not contain the (xAPI) acronym

Part Two: Experience API (xAPI) Data -- Does include the (xAPI) acronym.

Typically should define the acronym the first instance in the body text, then use acronym every time after. Suggest removing "(xAPI)" from Part Two header

[garemoko]

+1