Update app.py

app.py

@@ -79,7 +79,7 @@ async def on_message(message):
 async def post_to_slack(author, content, channel, url, slack_mention, trigger):
     try:
         response = slack_client.chat_postMessage(
-            channel=SLACK_CHANNEL_ID,
+            channel=SLACK_CHANNEL,
             text=f"{slack_mention} (for the keyword -> '{trigger}')\nFrom {author} in channel #{channel}: {content}\n{url}"
         )
     except SlackApiError as e: