Update livekit-rtc/livekit/rtc/data_stream.py

Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>

Author: lukasIO

livekit-rtc/livekit/rtc/data_stream.py

@@ -230,7 +230,7 @@ async def _send_trailer(self, trailer: proto_DataStream.Trailer) -> None:
         finally:
             FfiClient.instance.queue.unsubscribe(queue)
 
-        if cb.send_stream_chunk.error:
+        if cb.send_stream_trailer.error:
             raise ConnectionError(cb.send_stream_trailer.error)
 
     async def aclose(