feat: Improves SafeMarkdown HTML sanitization (#21895)

UPDATING.md

@@ -22,20 +22,12 @@ under the License.
 This file documents any backwards-incompatible changes in Superset and
 assists people when migrating to a new version.
 
-## Next
+## 2.0.1
 
 - [22022](https://github.com/apache/superset/pull/22022): HTTP API endpoints `/superset/approve` and `/superset/request_access` have been deprecated and their HTTP methods were changed from GET to POST
-- [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.
-- [20606](https://github.com/apache/superset/pull/20606): When user clicks on chart title or "Edit chart" button in Dashboard page, Explore opens in the same tab. Clicking while holding cmd/ctrl opens Explore in a new tab. To bring back the old behaviour (always opening Explore in a new tab), flip feature flag `DASHBOARD_EDIT_CHART_IN_NEW_TAB` to `True`.
-- [20799](https://github.com/apache/superset/pull/20799): Presto and Trino engine will now display tracking URL for running queries in SQL Lab. If for some reason you don't want to show the tracking URL (for example, when your data warehouse hasn't enable access for to Presto or Trino UI), update `TRACKING_URL_TRANSFORMER` in `config.py` to return `None`.
-- [21002](https://github.com/apache/superset/pull/21002): Support Python 3.10 and bump pandas 1.4 and pyarrow 6.
-- [21163](https://github.com/apache/superset/pull/21163): When `GENERIC_CHART_AXES` feature flags set to `True`, the Time Grain control will move below the X-Axis control.
-- [21284](https://github.com/apache/superset/pull/21284): The non-functional `MAX_TABLE_NAMES` config key has been removed.
 
 ### Breaking Changes
 
-- [21765](https://github.com/apache/superset/pull/21765): For deployments that have enabled the "ALERT_REPORTS" feature flag, Gamma users will no longer have read and write access to Alerts & Reports by default. To give Gamma users the ability to schedule reports from the Dashboard and Explore view like before, create an additional role with "can read on ReportSchedule" and "can write on ReportSchedule" permissions. To further give Gamma users access to the "Alerts & Reports" menu and CRUD view, add "menu access on Manage" and "menu access on Alerts & Report" permissions to the role.
-
 ### Potential Downtime
 
 ### Other