Update event_consumer.py

Author: pstephengoogle

src/a2a/server/events/event_consumer.py

@@ -15,6 +15,7 @@
 from a2a.utils.errors import ServerError
 from a2a.utils.telemetry import SpanKind, trace_class
 
+
 # This is an alias to the exception for closed queue
 QueueClosed = asyncio.QueueEmpty