Enhance readthedoc contents

add a bit more details information in readthedoc

Issue-ID: CLAMP-257

Change-Id: I99fa8f32e0c5d4413ace657c931d3c99575876b6
Signed-off-by: osgn422w <gervais-martial.ngueko@intl.att.com>
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 947fbd3..95fab08 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -5,6 +5,21 @@
 Release Notes
 =============
 
+Version: 3.0.3 - maintenance release
+------------------------------------
+
+:Release Date: 2019-02-06
+
+**New Features**
+none
+
+**Bug Fixes**
+none
+
+**Known Issues**
+one documentation issue was fixed, this issue does not require a new docker image: 
+    - `CLAMP-257 <https://jira.onap.org/browse/CLAMP-257>`_ User Manual for CLAMP : nothing on readthedocs.
+
 Version: 3.0.3
 --------------