Adjust security release notes according to the template

Issue-ID: SECCOM-238
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Change-Id: Id95d33400e1ef88ec051e280e7c850c9ec5e05ea
(cherry picked from commit 7995eca6ba48a3129fd0c6f1b20b925e0b306999)
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 7e2736d..7236d84 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -31,7 +31,12 @@
            4. Then demo user can access AAI UI app from Portal
 
 **Security Notes**
-        * Security Enhancements - Fixed OJSI issues.
+
+*Fixed Security Issues*
+
+*Known Security Issues*
+
+*Known Vulnerabilities in Used Modules*
         * Addressed security issues reported by NexusIQ Critical and Severe issues
 
 Quick Links: