Fix clippy warning

src/lib.rs

@@ -110,7 +110,7 @@ where
     }
 }
 
-//// Byte-based encoding of keys
+/// Byte-based encoding of signing and verification keys
 ///
 /// This is similar to [signature::SignatureEncoding] but for keys.
 pub trait ByteEncoding: Clone + Sized + for<'a> TryFrom<&'a [u8]> + TryInto<Self::Repr> {