JAVA -> Java

Java is not an acronym or an abbreviation, it should not be written in all-caps (doing so encourages the misunderstanding further, especially as exerscism.io is aimed at newbies!).

docs/ABOUT.md

 
 The language derives much of its syntax from C and C++, but it has fewer low-level facilities than either of them.
 
-## Why Learn JAVA?
+## Why Learn Java?
 
 - JAVA IS EVERYWHERE. It is one of the most sought after programming languages. It is a standard for enterprise software, web-based content, games and mobile apps, as well as the [Android operating system](https://developer.android.com/index.html).