fix capitalization (#1381)

Author: ethanpalm

ai/agent.mdx

@@ -22,7 +22,7 @@ To get started, add the agent to your Slack workspace and mention it with `@mint
 ## Add the agent to your Slack workspace
 
 <Note>
-  If your Slack Workspace Owner requires admin approval to install apps, ask them to approve the mintlify app before you connect it.
+  If your Slack Workspace Owner requires admin approval to install apps, ask them to approve the Mintlify app before you connect it.
 </Note>
 
 1. Navigate to the [agent](https://dashboard.mintlify.com/products/agent) page of your dashboard.