DOCS-3217: Add query assistant callout (#4780)

Author: npentrel

docs/data-ai/data/query.md

@@ -54,6 +54,10 @@ Then, select either **SQL** or **MQL**.
 
 Optionally, you can change the data source to query data from a configured [hot data store](/data-ai/data/hot-data-store/).
 
+{{< alert title="Tip: Query Assistant" color="tip" >}}
+For help with writing queries, use the **Query Assistant** button in the top right corner.
+{{< /alert >}}
+
 {{% /tablestep %}}
 {{% tablestep %}}
 **Run your query**