misc: remove private setter in MakeCredentialData.RawData

Author: DennisDyallo

Yubico.YubiKey/src/Yubico/YubiKey/Fido2/MakeCredentialData.cs

@@ -170,7 +170,7 @@ public class MakeCredentialData
         /// <summary>
         /// This returns the raw CBOR encoded credential data from the YubiKey, as returned by the MakeCredential operation.
         /// </summary>
-        public ReadOnlyMemory<byte> RawData { get; private set; }
+        public ReadOnlyMemory<byte> RawData { get; }
 
         // The default constructor explicitly defined. We don't want it to be
         // used.