[hive.operations] Fix \ref to \iref

Author: Andreas-Krug

source/containers.tex

@@ -8931,7 +8931,7 @@
 References, pointers, and iterators referring to elements in \tcode{*this},
 as well as the past-the-end iterator, may be invalidated.
 \begin{note}
-Not required to be stable\ref{algorithm.stable}.
+Not required to be stable\iref{algorithm.stable}.
 \end{note}
 \end{itemdescr}