chore: Adds apache#24029 breaking change to UPDATING.md

UPDATING.md

@@ -33,6 +33,7 @@ assists people when migrating to a new version.
 
 ### Breaking Changes
 
+- [24029](https://github.com/apache/superset/pull/24029) Removes the `user` and `username` arguments for the `QUERY_LOGGER` and `SQL_QUERY_MUTATOR` methods respectively. If the username for the current user is required, the `superset.utils.core.get_username` method should be used.
 - [24128](https://github.com/apache/superset/pull/24128) The `RLS_BASE_RELATED_FIELD_FILTERS` config parameter has been removed. Now the Tables dropdown will feature the same tables that the user is able to see elsewhere in the application using the standard `DatasourceFilter`, and the Roles dropdown will be filtered using the filter defined in `EXTRA_RELATED_QUERY_FILTERS["role"]`.
 - [23785](https://github.com/apache/superset/pull/23785) Deprecated the following feature flags: `CLIENT_CACHE`, `DASHBOARD_CACHE`, `DASHBOARD_FILTERS_EXPERIMENTAL`, `DASHBOARD_NATIVE_FILTERS`, `DASHBOARD_NATIVE_FILTERS_SET`, `DISABLE_DATASET_SOURCE_EDIT`, `ENABLE_EXPLORE_JSON_CSRF_PROTECTION`, `REMOVE_SLICE_LEVEL_LABEL_COLORS`. It also removed `DASHBOARD_EDIT_CHART_IN_NEW_TAB` as the feature is supported without the need for a feature flag.
 - [22801](https://github.com/apache/superset/pull/22801): The Thumbnails feature has been changed to execute as the currently logged in user by default, falling back to the selenium user for anonymous users. To continue always using the selenium user, please add the following to your `superset_config.py`: `THUMBNAILS_EXECUTE_AS = ["selenium"]`
@@ -77,8 +78,6 @@ assists people when migrating to a new version.
 
 - [23118](https://github.com/apache/superset/pull/23118): Previously the "database access on <database>" permission granted access to all datasets on the underlying database, but they didn't show up on the list views. Now all dashboards, charts and datasets that are accessible via this permission will also show up on their respective list views.
 
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 ## 2.0.1
 
 - [21895](https://github.com/apache/superset/pull/21895): Markdown components had their security increased by adhering to the same sanitization process enforced by Github. This means that some HTML elements found in markdowns are not allowed anymore due to the security risks they impose. If you're deploying Superset in a trusted environment and wish to use some of the blocked elements, then you can use the HTML_SANITIZATION_SCHEMA_EXTENSIONS configuration to extend the default sanitization schema. There's also the option to disable HTML sanitization using the HTML_SANITIZATION configuration but we do not recommend this approach because of the security risks. Given the provided configurations, we don't view the improved sanitization as a breaking change but as a security patch.