Update changelog.md (#4421)

* Update changelog.md

Signed-off-by: Daniel Levy <145054291+dannydanlev@users.noreply.github.com>

* updates on review

---------

Signed-off-by: Daniel Levy <145054291+dannydanlev@users.noreply.github.com>
Co-authored-by: Daniel Levy <145054291+dannydanlev@users.noreply.github.com>

Author: atovpeko

about/changelog.md

@@ -9,6 +9,34 @@ products: [cloud]
 
 All the latest features and updates to $CLOUD_LONG.
 
+## Phased update rollouts, `pg_cron`, larger compute options, and backup reports 
+<Label type="date">September 12, 2025</Label>
+
+### 🛡️ Phased rollouts for TimescaleDB minor releases
+
+Starting with TimescaleDB 2.22.0, minor releases will now roll out in phases. Services tagged `#dev` will get upgraded first, followed by `#prod` after 21 days. This gives you time to validate upgrades in `#dev` before they reach `#prod` services. [Subscribe](https://status.timescale.com/?__hstc=231067136.cc62bfc44030d30e3b1c3d1bc78c9cab.1750169693582.1757669826871.1757685085606.116&__hssc=231067136.4.1757685085606&__hsfp=2801608430) to get an email notification before your `#prod` service is upgraded. See [Maintenance and upgrades](https://docs.tigerdata.com/use-timescale/latest/upgrades/) for details.
+
+### ⏰ pg_cron extension
+
+`pg_cron` is now available on Tiger Cloud! With `pg_cron`, you can:
+- Schedule SQL commands to run automatically—like generating weekly sales reports or cleaning up old log entries every night at 2 AM.
+- Automate routine maintenance tasks such as refreshing materialized views hourly to keep dashboards current.
+- Eliminate external cron jobs and task schedulers, keeping all your automation logic within PostgreSQL.
+
+To enable `pg_cron` on your service, contact our support team. We're working on making this self-service in future updates.
+
+### ⚡️ Larger compute options: 48 and 64 CPU
+
+For the most demanding workloads, you can now create services with 48 and 64 CPUs. These options are only available on our Enterprise plan, and they're dedicated instances that are not shared with other customers.
+
+### 📋 Backup report for compliance
+
+Scale and Enterprise customers can now see a list of their backups in Tiger Cloud Console. For customers with SOC 2 or other compliance needs, this serves as auditable proof of backups.
+
+### 🗺️ New router for Tiger Cloud Console
+
+The UI just got snappier and easier to navigate with improved interlinking. For example, click an object in the `Jobs` page to see what hypertable the job is associated with.
+
 ## New data import wizard
 <Label type="date">September 5, 2025</Label>