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

games/library/freetype.md

@@ -6,10 +6,10 @@ _Capable of producing high-quality output (glyph images) of most vector and bitm
 - Media: https://en.wikipedia.org/wiki/FreeType
 - Download: https://www.freetype.org/download.html
 - State: mature
-- Code: http://git.savannah.gnu.org/cgit/freetype/
-- Language(s): C
+- Code repository: http://git.savannah.gnu.org/cgit/freetype/
+- Code language: C
 - Code license: GPL
 
 ## Building
 
-Uses CMake
+- Build system: CMake