Update app.py

app.py

@@ -187,7 +187,7 @@ async def on_thread_update(before, after):
 def react_to_slack_message(thread_ts, emoji):
     try:
         response = slack_client.reactions_add(
-            channel=SLACK_CHANNEL_ID,
+            channel=SLACK_CHANNEL_ID_TEST,
             name=emoji,
             timestamp=thread_ts
         )