when building on Apple with Clang >= 17. These specialisations are not strictly required by the C++ standard, and have been removed from LLVM. Fixes https://gitlab.com/kicad/code/kicad/-/issues/20631
Recommendation is to avoid using the year nomenclature as this information is already encoded in the git repo. Avoids needing to repeatly update. Also updates AUTHORS.txt from current repo with contributor names