Update CHANGES.md

Author: sureshrupnar

CHANGES.md

@@ -171,4 +171,9 @@ Major release of chat workflow.  Most interfaces for this changed.  See migratio
 # Oct 13, 2021
 
  - Symphony API version upgraded to v20.13 by #238
- - Fix for #232, Un-marshelling of historical objects 
+ - Fix for #232, Un-marshelling of historical objects 
+
+# Oct 20, 2021
+
+ - Fix for #241, fixing mock issue
+ - Fix for #239, fixing Integration test