message: example: adapt after mission API changed
diff: @@ -112,11 +112,11 @@ int main(int /*argc*/, char ** /*argv*/)
  {
  std::cout << "Uploading mission..." << std::endl;
  - // We only have the send_mission function asynchronous for now, so we wrap it using
  + // We only have the upload_mission function asynchronous for now, so we wrap it using
  // std::future.
  auto prom = std::make_shared<std::promise<Mission::Result>>();
  auto future_result = prom->get_future();
  - device.mission().send_mission_async(
  + device.mission().upload_mission_async(
  mission_items, [prom](Mission::Result result) {
  prom->set_value(result);
  });
  