CHANGELOG in message_bus-3.3.4 vs CHANGELOG in message_bus-3.3.5

@@ -1,5 +1,12 @@
-- Unrelease
[phone]
+
+- Version 3.3.5
+
+  - PERF: Optimised CORS preflight handling
+  - FEATURE: Enable CORS preflight caching
+  - FEATURE: Removed trailing cache buster from message bus polls
+  - PERF: Improved delay poll timeout for cases where a tab moves in and out of the background
 
 02-10-2020
 
 - Version 3.3.4