Update release notes wrt #740

Author: k163377

release-notes/CREDITS-2.x

@@ -18,6 +18,7 @@ Contributors:
 # 2.17.0 (not yet released)
 
 WrongWrong (@k163377)
+* #740: Reduce conversion cache from Executable to KFunction.
 * #738: Fix JacksonInject priority.
 * #732: SequenceSerializer removed.
 * #727: Fixed overriding findCreatorAnnotation instead of hasCreatorAnnotation

release-notes/VERSION-2.x

@@ -18,6 +18,8 @@ Co-maintainers:
 
 2.17.0 (not yet released)
 
+#740: Reduce conversion cache from Executable to KFunction.
+ This will reduce memory usage efficiency and total memory consumption, but may result in a minor performance degradation in use cases where a large number of factory functions are used as JsonCreator.
 #738: JacksonInject is now preferred over the default argument(fixes #722).
 #732: SequenceSerializer removed.
 #727: Fixed overriding findCreatorAnnotation instead of hasCreatorAnnotation.