docs: Mention change in configuration file in release note.

Change-Id: I70dda0a904e03bdd93b3f2f4404f70ecd108b65d
diff --git a/docs/RELEASE-NOTES.rst b/docs/RELEASE-NOTES.rst
index 7e56531..8f72a08 100644
--- a/docs/RELEASE-NOTES.rst
+++ b/docs/RELEASE-NOTES.rst
@@ -8,6 +8,8 @@
 
 **Code changes**:
 
+- Updated validation checker for LSA rule in the configuration file (:issue:`2965`)
+
 - Do not advertise Adjacency LSAs when hyperbolic routing is enabled (:issue:`2402`)
 
 - Do not distribute coordinate LSAs when using link-state routing. (:issue:`3661`)