MG: Review doc.

[olivegamestudio]

articles/tutorials/advanced/MobileDeployment/02_crossplatform/index.md

Prerequisites

Before starting this chapter, ensure you have:

(MonoGame#169 (comment))
Ideally, this should be included in the previous chapter, which detailed what the reader should know before starting the tutorial.
By Chapter 2, they should be "ready" to begin 🗡️