updated release notes

Author: Maria Farooq

restcomm/restcomm.docs/sources-asciidoc/src/main/asciidoc/release-notes.adoc

@@ -29,6 +29,7 @@ The folowing tags are used to categorize and state the scope of a change
 * Configurable inbound/outbound SMPP encoding
 * Race condition on sending BYE to incoming call for a dial fork scenario
 * Fixed SDR event for SMS - **commercial**
+* Fixed REFER method to work with domain name as organization
 
 
 === Migration Notes