DOCSP-31553-change-streams-clarification (#5790) (#5835)

Author: mmaville-mdb

source/changeStreams.txt

@@ -26,7 +26,7 @@ Change Streams
    :keywords: database triggers, real time, code example, node.js, java sync, motor, swift sync, swift async
 
 Change streams allow applications to access real-time data changes
-without the complexity and risk of tailing the :term:`oplog`.
+without the prior complexity and risk of manually tailing the :term:`oplog`.
 Applications can use change streams to subscribe to all data changes on
 a single collection, a database, or an entire deployment, and
 immediately react to them. Because change streams use the aggregation