3.1.1 release notes section

- CPS release notes section.

Issue-ID: CPS-1302
Change-Id: Ie11500a12288f2f1dd6799604a13e839ecff300e
Signed-off-by: mpriyank <priyank.maheshwari@est.tech>
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 6752a40..aa09eee 100755
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -16,6 +16,30 @@
 ..      * * *   KOHN   * * *
 ..      ====================
 
+Version: 3.1.1
+==============
+
+Release Data
+------------
+
++--------------------------------------+--------------------------------------------------------+
+| **CPS Project**                      |                                                        |
+|                                      |                                                        |
++--------------------------------------+--------------------------------------------------------+
+| **Docker images**                    | onap/cps-and-ncmp:3.1.1                                |
+|                                      |                                                        |
++--------------------------------------+--------------------------------------------------------+
+| **Release designation**              | 3.1.1 Kohn                                             |
+|                                      |                                                        |
++--------------------------------------+--------------------------------------------------------+
+| **Release date**                     | (yet to release)                                       |
+|                                      |                                                        |
++--------------------------------------+--------------------------------------------------------+
+
+Bug Fixes
+---------
+   - None
+
 Version: 3.1.0
 ==============