[climits.syn] Update to refer to C23 5.3.5.3.2

... due to new sections added after WG14 N3220

Author: frederick-vs-ja

source/support.tex

@@ -1828,7 +1828,7 @@
 type of \tcode{T}\iref{conv.prom}.
 \end{note}
 
-\xrefc{5.2.4.2.1}
+\xrefc{5.3.5.3.2}
 
 \rSec2[cfloat.syn]{Header \tcode{<cfloat>} synopsis}