update release notes

RELEASE.md

@@ -1,3 +1,23 @@
+# _Natural Person and NaturalPersonRole circular reference_
+
+_Background_
+
+An issue regarding a circular reference inside the `NaturalPerson` type was recently found in the model.
+`NaturalPerson` and `NaturalPersonRole` are located at the same level inside `Party`, to follow the same structure that `Party` and `PartyRole` have inside the `Trade` type. The circular reference issue appears because the `NaturalPerson` type also contains a `NaturalPersonRole`, which references back to the containing type of `NaturalPerson`, causing a circular reference in the model.
+This release fixes this issue by removing the `NaturalPersonRole` inside the `NaturalPerson` type.
+
+_What is being released?_
+
+_Data types_
+
+* `personRole` attribute of type `NaturalPersonRole` removed from `NaturalPerson`.
+
+_Review directions_
+
+In the CDM Portal, select the Textual Browser and inspect each of the changes identified above.
+
+Changes can be reviewed in PR: https://github.com/finos/common-domain-model/pull/2546
+
 # _Event Model - Qualification Functions - Enhancements for the Contract Formation qualification function_
 
 _Background_