f fix math

Author: TheBlueMatt

lightning/src/routing/scoring.rs

@@ -589,7 +589,7 @@ pub struct ProbabilisticScoringFeeParameters {
 	/// liquidity in a channel is just as likely to be at any point between our lower and upper
 	/// bounds.
 	///
-	/// If this flag is *not* set, that PDF is `(x - 0.5*capacity) ^ 6`. That is, we use an
+	/// If this flag is *not* set, that PDF is `(x - 0.5*capacity) ^ 2`. That is, we use an
 	/// exponential curve which expects the liquidity of a channel to lie "at the edges". This
 	/// matches experimental results - most routing nodes do not aggressively rebalance their
 	/// channels and flows in the network are often unbalanced, leaving liquidity usually