Native: update NamedCurveHash values for Keccak256 hasher

Use 122 and 123 respectively for secp256k1Keccak256 and
secp256r1Keccak256.

Port the
neo-project/neo@e7d9122.

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>

src/Neo.SmartContract.Framework/Native/NamedCurveHash.cs

@@ -16,9 +16,6 @@ namespace Neo.SmartContract.Framework.Native
     /// Represents a pair of the named curve used in ECDSA and a hash algorithm used to hash message.
     /// This is a compatible extension of an obsolete <see cref="NamedCurve"/> enum.
     /// </summary>
-    /// <remarks>
-    /// https://tools.ietf.org/html/rfc4492#section-5.1.1
-    /// </remarks>
     public enum NamedCurveHash : byte
     {
         /// <summary>
@@ -34,11 +31,11 @@ public enum NamedCurveHash : byte
         /// <summary>
         /// The secp256k1 curve and Keccak256 hash algorithm.
         /// </summary>
-        secp256k1Keccak256 = 24,
+        secp256k1Keccak256 = 122,
 
         /// <summary>
         /// The secp256r1 curve, which known as prime256v1 or nistP-256, and Keccak256 hash algorithm.
         /// </summary>
-        secp256r1Keccak256 = 25
+        secp256r1Keccak256 = 123
     }
 }