nit: said chat instead of assistant (#1031)

* nit - said chat instead of assistant

* update API intro

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Co-authored-by: Ethan Palm <[email protected]>

Author: baell

ai/slack-app.mdx

@@ -10,7 +10,7 @@ icon: "slack"
 
 The Slack app adds a bot named `@mintlify` to your Slack workspace that can search your documentation and answer users' questions. The bot responds to direct messages, @mentions, and to any questions in a channel specifically named `#ask-ai`.
 
-The Slack app can incur costs: either using your AI chat credits or incurring overages.
+The Slack app can incur costs: either using your AI assistant credits or incurring overages.
 
 ## Setting up the Slack app
 

api-reference/introduction.mdx

@@ -34,5 +34,5 @@ The assistant API **key** is a server-side token that should be kept secret.
 The assistant API **token** is a public token that can be referenced in your frontend code.
 
 <Note>
-  Calls using the assistant API token can incur costs: either using your AI chat credits or incurring overages.
+  Calls using the assistant API token can incur costs: either using your AI assistant credits or incurring overages.
 </Note>