Update docs/modules/ROOT/examples/merging/tutorial001.py

Co-authored-by: Oleksii Symon <oleksii.symon@corva.ai>

Author: corva-alex-s

docs/modules/ROOT/examples/merging/tutorial001.py

@@ -3,7 +3,7 @@
 
 # imagine we actually have 3 incoming events with 3 records each
 @stream(merge_events=True)
-def task_app(event: StreamTimeEvent, api: Api):
+def app(event: StreamTimeEvent, api: Api):
     # since we passed merge_events=True all 3 incoming events
     # and their records will be merged into a single event with 9 records
     assert len(event.records) == 9  # this will not fail