[meta.reflection.array] Use "character type" in Mandates

Author: eisenwave

source/meta.tex

@@ -5698,12 +5698,7 @@
 
 \pnum
 \mandates
-\tcode{CharT} is one of
-\tcode{char},
-\tcode{wchar_t},
-\tcode{char8_t},
-\tcode{char16_t},
-\tcode{char32_t}.
+\tcode{CharT} is a character type\iref{basic.fundamental}.
 
 \pnum
 Let $V$ be the pack of values of type \tcode{CharT}