f correct event reference

Author: TheBlueMatt

lightning-invoice/src/payment.rs

@@ -1586,7 +1586,7 @@ mod tests {
 		// get two failures in a row with the second having `all_paths_failed` set.
 		// Generally, when we give up trying to retry a payment, we don't know for sure what the
 		// current state of the ChannelManager event queue is. Specifically, we cannot be sure that
-		// there are not multiple additional `PaymentPathFailed` or even `PaymentSuccess` events
+		// there are not multiple additional `PaymentPathFailed` or even `PaymentSent` events
 		// pending which we will see later. Thus, when we previously removed the retry tracking map
 		// entry after a `all_paths_failed` `PaymentPathFailed` event, we may have dropped the
 		// retry entry even though more events for the same payment were still pending. This led to