Updated the CI for macOS to use the latest Mono.
Updated the CI for macOS to use the latest Mono.

Signed-off-by: Dimitar Dobrev <ca751a5c976abad79158718440750fc638d19ebc@protonmail.com>

mono/CppSharp,ddobrev/CppSharp,u255436/CppSharp,u255436/CppSharp,mohtamohit/CppSharp,u255436/CppSharp,mono/CppSharp,mohtamohit/CppSharp,mono/CppSharp,ddobrev/CppSharp,ddobrev/CppSharp,zillemarco/CppSharp,ddobrev/CppSharp,mohtamohit/CppSharp,zillemarco/CppSharp,u255436/CppSharp,zillemarco/CppSharp,mohtamohit/CppSharp,mono/CppSharp,zillemarco/CppSharp,ddobrev/CppSharp,u255436/CppSharp,zillemarco/CppSharp,mohtamohit/CppSharp,mono/CppSharp,mono/CppSharp