Update changelog with November 2025 features (#1494)

Added new entries for November 25, 2025, detailing updates on observability features including usage metrics for Config Sync Groups, network IO reporting, and disk usage breakdowns.

Co-authored-by: Alan Dooley <a.dooley@f5.com>
Co-authored-by: Mike Jang <3287976+mjang@users.noreply.github.com>

Author: 3 people

content/nginx-one-console/changelog.md

@@ -9,17 +9,31 @@ nd-docs: DOCS-1394
 
 Stay up-to-date with what's new and improved in the F5 NGINX One Console.
 
+## November 25, 2025
+
+### Observability: Usage metrics data now available for Config Sync Groups
+
+The Config Sync Group detail page now includes a dashboard containing traffic metrics which mirror those on the Instance detail dashboard. The reported numbers are aggregated from the data reported by the Instances belonging to the Config Sync Group.
+
+### Observability: Network IO now reports Instance or Config Sync Group traffic instead of system traffic
+
+Previously the network IO metrics presented on the Instance detail dashboard represented system-level network traffic, but will now only represent traffic served by NGINX directly. This applies to the new Config Sync Group detail dashboard as well.
+
+### Observability: Disk usage now correctly broken up by mount point
+
+An issue has been fixed with the disk usage data presented on the Instance detail dashboard, and disk usage should now be correctly broken up by mount point in all cases.
+
 ## October 22, 2025
 
 ### Observability: Network IO is now presented as a rate
 
-For each instance, you can now review system traffic, in and out, in bits per second. NGINX One Console no longer uses a cumulative value.
+For each Instance, you can now review system traffic, in and out, in bits per second. NGINX One Console no longer uses a cumulative value.
 
 ## October 7, 2025
 
-### Compare multiple metrics in instance observability
+### Compare multiple metrics in Instance observability
 
-You can now graph any two metrics simultaneously on one chart within the Metrics tab for each instance in the NGINX One Console UI.
+You can now graph any two metrics simultaneously on one chart within the Metrics tab for each Instance in the NGINX One Console UI.
 
 ## October 6, 2025