Add reply dialog posts patchset comments

Change-Id: I498bfecf2594666952c914cdb6a9fa5976ad1ac7
diff --git a/pages/site/releases/3.3.md b/pages/site/releases/3.3.md
index 3e4807d..df8732a 100644
--- a/pages/site/releases/3.3.md
+++ b/pages/site/releases/3.3.md
@@ -69,6 +69,8 @@
 
   Enabled by default.
 
+* Reply dialog posts patchset level comments instead of change messages
+
 ### REST API changes
 
 * Reject REST requests with invalid enum values as bad request