Fix: RingingTimeout was being skipped for transferParticipant (#3831)

We weren't relaying the RingingTimeout for transferSipParticipant. This fixes that

pkg/service/sip.go

@@ -704,9 +704,10 @@ func (s *SIPService) transferSIPParticipantRequest(ctx context.Context, req *liv
 	}
 
 	return &rpc.InternalTransferSIPParticipantRequest{
-		SipCallId:    callID,
-		TransferTo:   req.TransferTo,
-		PlayDialtone: req.PlayDialtone,
-		Headers:      req.Headers,
+		SipCallId:      callID,
+		TransferTo:     req.TransferTo,
+		PlayDialtone:   req.PlayDialtone,
+		Headers:        req.Headers,
+		RingingTimeout: req.RingingTimeout,
 	}, nil
 }