Update src/app/ReadHandler.h

Co-authored-by: Tennessee Carmel-Veilleux <tennessee.carmelveilleux@gmail.com>

Author: andy31415

src/app/ReadHandler.h

@@ -566,7 +566,7 @@ class ReadHandler : public Messaging::ExchangeDelegate
     // The last schedule event number snapshoted in the beginning when preparing to fill new events to reports
     EventNumber mLastScheduledEventNumber = 0;
 
-    /// State for any on-going path expansion for handling wildcard reads/subscriptions
+    /// Iterator position state for any on-going path expansion for handling wildcard reads/subscriptions.
     AttributePathExpandIterator::Position mAttributePathExpandPosition;
 
     Messaging::ExchangeHolder mExchangeCtx;