[hive.cons]/15 Add noexcept to move constructor

The synopsis specifies noexcept for this constructor and the effects
don't invoke behavior that could throw, so the missing noexcept looks
like an oversight. However, the originating paper P0447R28 is also
missing noexcept here.

Author: birbacher

source/containers.tex

@@ -8281,7 +8281,7 @@
 
 \indexlibraryctor{hive}%
 \begin{itemdecl}
-hive(hive&& x);
+hive(hive&& x) noexcept;
 hive(hive&& x, const type_identity_t<Allocator>& alloc);
 \end{itemdecl}