[format.string.std] Use "declare" for typedef-names

Author: frederick-vs-ja

source/text.tex

@@ -6642,7 +6642,7 @@
 \topline
 \lhdr{Type} & \rhdr{Meaning} \\ \rowsep
 none, \tcode{p} &
-If \tcode{uintptr_t} is defined,
+If \tcode{uintptr_t} is declared,
 \begin{codeblock}
 to_chars(first, last, reinterpret_cast<uintptr_t>(value), 16)
 \end{codeblock}