fix smells: 'TcpClientWrapper' - make '_host' and '_port' 'readonly'

Author: Dark927

NetSdrClientApp/Networking/TcpClientWrapper.cs

@@ -12,8 +12,8 @@ namespace NetSdrClientApp.Networking
 {
     public class TcpClientWrapper : ITcpClient
     {
-        private string _host;
-        private int _port;
+        private readonly string _host;
+        private readonly int _port;
         private TcpClient? _tcpClient;
         private NetworkStream? _stream;
         private CancellationTokenSource _cts;