[iterator.requirements.general] Operations satisfy requirements, not operations (#2375)

Drive-by: change "satisfy .... requirements" to "meet ... requirements".

Author: CaseyCarter

source/iterators.tex

@@ -227,7 +227,7 @@
 \pnum
 \indextext{iterator!constexpr}%
 Iterators are called \defn{constexpr iterators}
-if all operations provided to satisfy iterator category operations
+if all operations provided to meet iterator category requirements
 are constexpr functions, except for
 \begin{itemize}
 \item a pseudo-destructor call\iref{expr.pseudo}, and