[c.malloc] Update to refer to C23 7.24.4

Author: frederick-vs-ja

source/memory.tex

@@ -2207,7 +2207,7 @@
 \tcode{::operator delete()}\indexlibrarymember{delete}{operator}.
 \end{itemdescr}
 
-\xrefc{7.22.3}
+\xrefc{7.24.4}
 
 \rSec1[smartptr]{Smart pointers}