Added gnbsim support in release document

Change-Id: Ic3129914256172a11d9fb6ac192a269e43b9b9cf
diff --git a/overview/faq.rst b/overview/faq.rst
index cbe0c3a..28429dc 100644
--- a/overview/faq.rst
+++ b/overview/faq.rst
@@ -5,21 +5,29 @@
 FAQs
 ====
 
-    * ** Q: Does SD-Core support for roaming architecture?**
+    * **Does SD-Core support for roaming architecture?**
 
       *SD-Core is primarily focused for private 5G  & private LTE use cases and*
       *hence roaming aspects of architecture are not supported.*
 
-    * ** Q: Does SD-Core support charging functionality or CHF (charging network function)?**
+    * **Does SD-Core support charging functionality or CHF (charging network function)?**
 
         *SD-Core is primarily focussed for private 5G & private LTE use cases and*
         *hence charging related aspects are not supported.*
 
-    * ** Q: Is SD-Core/5G-Core cloud native? **
+    * **Is SD-Core/5G-Core cloud native?**
 
         *SD-Core is not cloud native, but it runs in K8s environment.*
         *As per road map AMF, SMF will be cloud native by the mid of 2022. This is WIP.*
 
-    * ** Q. What are the changes omec 5G has on top of free5gc? **
+    * **What are the changes omec 5G has on top of free5gc?**
 
         * Please refer this - document for details of the changes.*
+
+    * **Network Performance Testing of SD-Core**
+
+        *No performance results available. Limited scale testing is performed to check*
+        *the control plane subscriber capacity and  transaction rate. But still its not*
+        *formal enough to share with wider community. Watch out for release notes and testing
+        *section to get current performance results*
+