Update content/nginx-one/changelog.md

Author: mjang

content/nginx-one/changelog.md

@@ -34,6 +34,8 @@ Stay up-to-date with what's new and improved in the F5 NGINX One Console.
 
 ## January 20, 2025
 
+### AI Assistant
+
 In the F5 NGINX One Console, you can now select lines from your configuration files, and then select **Explain with AI**. The NGINX One AI Assistant explains those lines based on the official NGINX documentation.
 
 ## November 7, 2024