Update ai/slack-app.mdx

Author: mintlify[bot]

ai/slack-app.mdx

@@ -23,5 +23,5 @@ The Slack app can incur costs: either using your AI assistant credits or incurri
 3. Follow the Slack prompts to add the app to your workspace.
 4. Test that the bot is working and responds when you:
   - Send a direct message to the Mintlify app.
-  - Mention the bot with `@mintlify` in a channel.
+  - Mention the bot with `@mintlify-assistant` in a channel.
   - Create an `#ask-ai` channel, add the bot, and ask a question.