[Docs] - id-software/Quake 2 - readme.md [minor tweaks]

[ghost]

[Docs] - id-software/Quake 2 - readme.md [minor tweaks]

humble attempt at contributing to the documentation of the engine of one of the one of the best videogames of all time, which was one of the titles i felt most in love with in the end of my late childhood, despite the fact that i may acknowledge its a useless and unworthy commit/PR towards its source

[ghost]

_{just revised my previous PR. a lot has changed in the way i write documentation here on github since the original commit. so i though, why not updating this. would honestly appreciate some feedback}