02-Use_the_Tools_Available.md -> cmake/coite ist deprecated

[jolz]

coitre declares itself as depreacted:

from https://github.com/sakra/cotire/:

The functionality provided by cotire has been superseded by features added to CMake 3.16. Support for pre-compiling and unity builds is now built into CMake. Thus, there will not be any further updates or support for this project.