rename fields to improve understanding, adapting maintenance.py (intermediate)

games/rpg/atrinik.md

@@ -3,10 +3,10 @@
 _Multiplayer Online Role Playing Game (MORPG) with 2D isometric graphics based on Daimonin and Crossfire._
 
 - Home: https://www.atrinik.org/
-- Download: see home
-- Code: https://github.com/atrinik
-- Language(s): C
+- Download: (see home)
+- Code repository: https://github.com/atrinik
+- Code language: C
 
 ## Building
 
-Uses CMake
+- Build system: CMake