Release notes for Cm Subscriptions

- Added release notes for the CM Data Subscriptions epic for the
  positive scenarios.

Issue-ID: CPS-2324
Change-Id: I1b61113a6bfa365a5856b97433098420dbf59c90
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 08d1ac4..d236479 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -45,6 +45,7 @@
 Features
 --------
 3.5.2
+    - `CPS-1812 <https://jira.onap.org/browse/CPS-1812>`_ CM Data Subscriptions ( Create, Delete and Merging ) with positive scenarios
     - `CPS-2326 <https://jira.onap.org/browse/CPS-2326>`_ Uplift liquibase-core dependency to 4.28.0
     - `CPS-2366 <https://jira.onap.org/browse/CPS-2366>`_ Improve registration performance with use of alternateID