Merge pull request #4478 from ClickHouse/4206-clarify-changing-compatibility-in-clickhouse-cloud

Clarifying compatibility settings docs

Author: Blargian

docs/cloud/features/05_admin_features/upgrades.md

@@ -30,7 +30,7 @@ When you create a service, the [`compatibility`](/operations/settings/settings#c
 
 The `compatibility` setting allows you to use default values of settings from previous versions. When your service is upgraded to a new version, the version specified for the `compatibility` setting does not change. This means that default values for settings that existed when you first created your service will not change (unless you have already overridden those default values, in which case they will persist after the upgrade).
 
-You cannot manage the `compatibility` setting for your service. You must [contact support](https://clickhouse.com/support/program) if you would like to change the version set for your `compatibility` setting.
+You cannot manage the service-level default `compatibility` setting for your service. You must [contact support](https://clickhouse.com/support/program) if you would like to change the version set for your service's default `compatibility` setting. However, you can override the `compatibility` setting at the user, role, profile, query, or session level using standard ClickHouse setting mechanisms such as `SET compatibility = '22.3'` in a session or `SETTINGS compatibility = '22.3'` in a query.
 
 ## Maintenance mode {#maintenance-mode}
 

scripts/aspell-ignore/en/aspell-dict.txt

@@ -1,4 +1,4 @@
-personal_ws-1.1 en 3646
+personal_ws-1.1 en 3648
 AArch
 ACLs
 Accepter
@@ -1332,6 +1332,7 @@ Transactional
 TransactionsWaitCSNMode
 Trino
 Tsai
+Tunable
 Tukey
 TwoColumnList
 TypeScript
@@ -3477,6 +3478,7 @@ tui
 tukey
 tumbleEnd
 tumbleStart
+tunable
 tupleConcat
 tupleDivide
 tupleDivideByNumber