Update scaling.md

Updated blurb about MBB to add 1 hr wait time for queries to finish.

Author: aashishkohli

docs/cloud/manage/scaling.md

@@ -33,7 +33,7 @@ For Enterprise tier services scaling works as follows:
   - Custom profiles will not support vertical autoscaling or manual vertical scaling at launch. However, these services can be scaled vertically by contacting support.
 
 :::note
-We are introducing a new vertical scaling mechanism for compute replicas, which we call "Make Before Break" (MBB). This approach adds one or more replicas of the new size before removing the old replicas, preventing any loss of capacity during scaling operations. By eliminating the gap between removing existing replicas and adding new ones, MBB creates a more seamless and less disruptive scaling process. It is especially beneficial in scale-up scenarios, where high resource utilization triggers the need for additional capacity, since removing replicas prematurely would only exacerbate the resource constraints.
+Scaling in ClickHouse Cloud happens in what we call "Make Before Break" (MBB) approach. This adds one or more replicas of the new size before removing the old replicas, preventing any loss of capacity during scaling operations. By eliminating the gap between removing existing replicas and adding new ones, MBB creates a more seamless and less disruptive scaling process. It is especially beneficial in scale-up scenarios, where high resource utilization triggers the need for additional capacity, since removing replicas prematurely would only exacerbate the resource constraints. As part of this approach we wait up to an hour to let any existing queries complete on the older replicas before we will remove them. This balances the need for existing queries to complete, while at the same time ensuring that older replicas do not linger around for too long.
 
 Please note that as part of this change, historical system table data will be retained for up to a maximum of 30 days as part of scaling events. In addition, any system table data older than December 19, 2024, for services on AWS or GCP and older than January 14, 2025, for services on Azure will not be retained as part of the migration to the new organization tiers.
 :::