Updated release noes with #281.

Author: igaztanaga

doc/interprocess.qbk

@@ -6855,6 +6855,13 @@ thank them:
 
 [section:release_notes Release Notes]
 
+[section:release_notes_boost_1_92_00 Boost 1.92 Release]
+
+* Fixed bugs:
+   * [@https://github.com/boostorg/interprocess/issues/281 GitHub #281 (['"Locks in message_queue_t cover more code than intended?"])].
+
+[endsect]
+
 [section:release_notes_boost_1_91_00 Boost 1.91 Release]
 
 * Adds [link interprocess.managed_memory_segment_object_construction.uses_allocator uses-allocator construction]