Update index.md

Author: helenktsai

nservicebus/transactional-session/index.md

@@ -81,7 +81,7 @@ The transactional session feature requires a supported persistence package to st
 
 It's recommended to not mix the processing of dispatch messages with business messages in order to get:
 
-- Predictable dispatch message dispatch: Processing of dispatch messages will be more reliable since there is no risk of getting delayed behind slow business messages
+- Predictable dispatch message processing: Processing of dispatch messages will be more reliable since there is no risk of getting delayed behind slow business messages
 - More accurate metrics: Metrics like critical time and queue length will accurately represent the performance of the dispatch message processing and not be skewed by business messages
 - Simplified management: Knowing that the endpoint only processes dispatch messages makes it possible to always retry all failed messages related to the endpoint via tools like ServicePulse