Fix warnings in InvitationView

src/app/qml/InvitationView.qml

@@ -2,6 +2,8 @@
 // SPDX-FileCopyrightText: 2025 Joshua Goins <josh@redstrate.com>
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+pragma ComponentBehavior: Bound
+
 import QtQuick
 import QtQuick.Controls as QQC2
 import QtQuick.Layouts