update

git-svn-id: https://svn.r-project.org/R/trunk@87198 00db46b3-68df-0310-9c12-caf00c1e9a41

doc/manual/R-admin.texi

@@ -1039,14 +1039,14 @@ g++:     c++11 gnu+11 c++14 gnu++14 c++17 gnu++17 c++2a gnu++2a (from 8)
          c++20 gnu++20 (from 10) c++23 gnu++23 c++2b gnu++2b (from 11)
 Intel:   c++11  gnu+11 c++14 gnu++14 c++17 gnu++17
          c++20 gnu++20 (from 2021.1) c++2b gnu++2b (from 2022.2)
+         c++23 gnu++23 (at least from 2024.0)
 @end example
 @noindent
 (Those for @I{LLVM} @command{clang++} are documented at
 @uref{https://clang.llvm.org/cxx_status.html}, and follow @code{g++}:
 @code{-std=c++20} is supported from Clang 10, @code{-std=c++2b} from
 Clang 13 and @code{-std=c++23} from Clang 17.  Apple Clang supports
-@code{-std=c++2b} from 13.1.6: version 15.0.0 does not support
-@code{-std=c++23}.)
+@code{-std=c++2b} from 13.1.6 and @code{-std=c++23} from 16.0.0.)
 
 @c c++1y does not pass the configure test in gcc 4.9.3
 @c , with @option{-std=c++1y} (introduced@footnote{See