[charconv.from.chars] Update to refer to C23 7.24.2.6, 7.24.2.8

Author: frederick-vs-ja

source/text.tex

@@ -348,7 +348,7 @@
 Nothing.
 \end{itemdescr}
 
-\xrefc{7.22.1.3, 7.22.1.4}
+\xrefc{7.24.2.6, 7.24.2.8}
 
 \rSec1[localization]{Localization library}