Document destination handler reset fix in changelog

- TransactionParams::reset only cleared two of its fields, leaving
  stale acknowledged-mode state behind between transactions
- That state made the next transaction's Metadata PDU look like a
  duplicate, so it was silently dropped and the transfer never
  created its destination file

src/dest.rs

@@ -257,8 +257,7 @@ impl<CheckTimer: Countdown> Default for TransactionParams<CheckTimer> {
 
 impl<CheckTimer: Countdown> TransactionParams<CheckTimer> {
     fn reset(&mut self) {
-        self.finished_params.reset();
-        self.anomaly_tracker.reset();
+        *self = Self::default();
     }
 }