message: protobuf: update protobuf string wrapper
diff: @@ -6,7 +6,7 @@ namespace Envoy {
  MissingFieldException::MissingFieldException(const std::string& field_name,
  const Protobuf::Message& message)
  - : EnvoyException(
  - fmt::format("Field '{}' is missing in: {}", field_name, message.DebugString())) {}
  + : EnvoyException(fmt::format("Field '{}' is missing in: {}", field_name,
  + ProtobufTypes::FromString(message.DebugString()))) {}
  } // namespace Envoy
  