Fix comments for feerate-tolerance in reference.conf (#3053)

The "ratio-high" config setting is enforced for all commit formats,
not just the legacy format, unlike what the comment suggests.

Commit 36a3c88
invalidated the old comment.

Author: SomberNight

eclair-core/src/main/resources/reference.conf

@@ -269,8 +269,8 @@ eclair {
     }
 
     feerate-tolerance {
-      ratio-low = 0.5 // will allow remote fee rates as low as half our local feerate when not using anchor outputs
-      ratio-high = 10.0 // will allow remote fee rates as high as 10 times our local feerate when not using anchor outputs
+      ratio-low = 0.5 // will allow remote fee rates as low as half our local feerate (only enforced when not using anchor outputs)
+      ratio-high = 10.0 // will allow remote fee rates as high as 10 times our local feerate (for all commitment formats)
       // when using anchor outputs, we only need to use a commitment feerate that allows the tx to propagate: we will use CPFP to speed up confirmation if needed.
       // the following value is the maximum feerate we'll use for our commit tx (in sat/byte)
       anchor-output-max-commit-feerate = 10