C23 has now been tested with GCC 12 & 13

git-svn-id: https://svn.r-project.org/R/trunk@87622 00db46b3-68df-0310-9c12-caf00c1e9a41

doc/NEWS.Rd

@@ -487,7 +487,7 @@
     \itemize{
       \item \R can be installed using C23 (for example with
       \option{-std=gnu23} or \option{-std=gnu2x}) with recent compilers
-      including \command{gcc} 14, Apple \command{clang} 16 and \I{LLVM}
+      including \command{gcc} 12--14, Apple \command{clang} 16 and \I{LLVM}
       \command{clang} 17--19.  (\I{LLVM} \command{clang} 18 and 19 objected
       to apparently valid code using attributes accepted by all the
       other compilers.)