Add release notes for 3.9.1
diff --git a/activemq-cpp/RELEASE_NOTES.txt b/activemq-cpp/RELEASE_NOTES.txt
index 6cd3e64..e86b071 100644
--- a/activemq-cpp/RELEASE_NOTES.txt
+++ b/activemq-cpp/RELEASE_NOTES.txt
@@ -3,6 +3,20 @@
=========================================================================
=========================================================================
+== Release Notes for ActiveMQ CPP 3.9.1 ==
+=========================================================================
+
+Bug
+
+ [AMQCPP-585] - Date::toString() return wrong date string.
+ [AMQCPP-587] - ActiveMQ CPP (CMS) integration unit tests leads to client segmentation fault when executed against Artemis
+ [AMQCPP-589] - NPE when acknowledge called on message in some cases
+
+Improvement
+
+ [AMQCPP-588] - Always set a rollback cause on exception thrown in onMessage
+
+=========================================================================
== Release Notes for ActiveMQ CPP 3.9.0 ==
=========================================================================
