Static invoice server: fix incorrect comment

The comment stated we need peers to be connected in order to send certain onion
messages, but we actually need those peers available in order to create reply
paths.

Author: valentinewallace

lightning/src/ln/channelmanager.rs

@@ -12853,7 +12853,7 @@ where
 
 		// While we usually refresh the AsyncReceiveOfferCache on a timer, we also want to start
 		// interactively building offers as soon as we can after startup. We can't start building offers
-		// until we have some peer connection(s) to send onion messages over, so as a minor optimization
+		// until we have some peer connection(s) to receive onion messages over, so as a minor optimization
 		// refresh the cache when a peer connects.
 		#[cfg(async_payments)]
 		self.check_refresh_async_receive_offer_cache(false);