Update on Tenantegress process

When a new aws-region is added, the tenantegress is required to be
updated. The process to update the tenantegress is added for reference.

docs/aws-region-enable.md

@@ -52,6 +52,16 @@ In case of RHCOS:
 - Account: 531415883065
   ARN: arn:aws:iam::531415883065:user/art-rhcos-ci-s3-bot
   Refer 'RH-DEV AWS Account' in Bitwarden for User ID
+- Note:
+   - Make sure to add the new regions link in the Tenant Egress of the PROD Cluster to avoid any TCP timeout.
+   - Also, update the Tenant Egress directory with the details of the new aws regions and the DPP ticket.
+     Example:
+     ```
+      // DPP ticket - https://issues.redhat.com/browse/DPP-16314
+      to:
+        dnsName: ec2.ap-southeast-3.amazonaws.com
+      type: Allow
+    ```
 
 ### 4. Follow Up: