[basic.fundamental] Update to refer to C23 5.3.5.3.2

... due to new sections added after WG14 N3220

Author: frederick-vs-ja

source/basic.tex

@@ -5396,7 +5396,7 @@
 \end{note}
 \begin{note}
 The signed and unsigned integer types satisfy
-the constraints given in \IsoC{} 5.2.4.2.1.
+the constraints given in \IsoC{} 5.3.5.3.2.
 \end{note}
 Except as specified above,
 the width of a signed or unsigned integer type is