Update license to BSL-1.0

Summary: related to T13767 T13767

Reviewers: ivica

Reviewed By: ivica

Subscribers: miljen, iljazovic

Differential Revision: https://repo.mireo.local/D29686

example/multiflight_client.cpp

@@ -1,3 +1,10 @@
+//
+// Copyright (c) 2023-2024 Ivica Siladic, Bruno Iljazovic, Korina Simicevic
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
 //[multiflight_client
 #include <iostream>