Fix name of decimal according to the 1.04 standard

src/server/ua_server_ns0.c

@@ -240,7 +240,7 @@ UA_Server_createNS0_base(UA_Server *server) {
     ret |= addDataTypeNode(server, "LocalizedText", UA_NS0ID_LOCALIZEDTEXT, false, UA_NS0ID_BASEDATATYPE);
     ret |= addDataTypeNode(server, "StatusCode", UA_NS0ID_STATUSCODE, false, UA_NS0ID_BASEDATATYPE);
     ret |= addDataTypeNode(server, "Structure", UA_NS0ID_STRUCTURE, true, UA_NS0ID_BASEDATATYPE);
-    ret |= addDataTypeNode(server, "Decimal128", UA_NS0ID_DECIMAL128, false, UA_NS0ID_NUMBER);
+    ret |= addDataTypeNode(server, "Decimal", UA_NS0ID_DECIMAL, false, UA_NS0ID_NUMBER);
 
     ret |= addDataTypeNode(server, "Duration", UA_NS0ID_DURATION, false, UA_NS0ID_DOUBLE);
     ret |= addDataTypeNode(server, "UtcTime", UA_NS0ID_UTCTIME, false, UA_NS0ID_DATETIME);