[docs] Update links for C++ compiler supported features in CodingStandards (#81587)

Author: RIscRIpt

llvm/docs/CodingStandards.rst

@@ -73,7 +73,10 @@ Each toolchain provides a good reference for what it accepts:
 
   * libstdc++: https://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.2017
 
-* MSVC: https://msdn.microsoft.com/en-us/library/hh567368.aspx
+* MSVC: https://learn.microsoft.com/cpp/overview/visual-cpp-language-conformance
+
+Additionally, there are compiler comparison tables of supported C++ features on
+`cppreference.com <https://en.cppreference.com/w/cpp/compiler_support/17>`_.
 
 
 C++ Standard Library