hotfix: missing using in ed4aa31

Signed-off-by: MTsfoni <mibau89@gmail.com>

Author: mtsfoni

CycloneDX/Program.cs

@@ -15,6 +15,7 @@
 // SPDX-License-Identifier: Apache-2.0
 // Copyright (c) OWASP Foundation. All Rights Reserved.
 
+using System;
 using System.CommandLine;
 using System.CommandLine.Parsing;
 using System.Linq;