[mdspan.layout.stride.cons] Fix cross-reference (#6565)

Author: CaseyCarter

source/containers.tex

@@ -20564,7 +20564,7 @@
 \expects
 \begin{itemize}
 \item
-\tcode{StridedLayoutMapping} meets the layout mapping requirements\iref{mdspan.layout.policy.reqmts},
+\tcode{StridedLayoutMapping} meets the layout mapping requirements\iref{mdspan.layout.reqmts},
 \item
 \tcode{other.stride($r$) > 0} is \tcode{true}
 for every rank index $r$ of \tcode{extents()},