Improve DynamicPenaltyScorer documentation.

Author: tnull

lightning/src/routing/scoring.rs

@@ -271,7 +271,8 @@ impl<F> DynamicPenaltyScorer<F>
 where
 	F: Fn(u64, u64, u64, &NodeId, &NodeId) -> u64,
 {
-	/// Creates a new scorer using `penalty_func`.
+	/// Creates a new scorer that applies a closure `penalty_func`, which takes the same arguments
+	/// as [`Score::channel_penalty_msat`].
 	pub fn with_penalty_func(penalty_func: F) -> Self
 	{
 		Self { penalty_func }