To avoid windows firewall warnings when running csharpier as a server…

…, bind it to the loopback address (#1184)

Src/CSharpier.Cli/ServerFormatter.cs

@@ -22,9 +22,10 @@ CancellationToken cancellationToken
  builder.WebHost.ConfigureKestrel(
  (_, serverOptions) =>
  {
- serverOptions.Listen(IPAddress.Any, thePort);
+ serverOptions.Listen(IPAddress.Loopback, thePort);
  }
  );
+
  var app = builder.Build();
  var service = new CSharpierServiceImplementation(actualConfigPath, logger);
  app.MapPost(