updated extra upgrade notice

Author: christophdb

docs/upgrade/extra-upgrade-notice.md

@@ -1,8 +1,8 @@
 # Extra upgrade notice
 
-## 5.3 (will be released on June 16th, 2025)
+## 5.3
 
-SeaTable v5.3 requires some changes. We have tried to make these changes as easy as possible by providing a script that will handle the heavy lifting for you.
+SeaTable v5.3 introduces several significant changes. To make the transition as smooth as possible, we’ve provided a script that handles most of the work for you. Simply run the script to get started.
 
 ```bash
 bash /opt/seatable-compose/migrate/migrate_5.2_5.3.sh
@@ -134,9 +134,6 @@ Of course, you can skip this script and make the changes manually. The following
 
     The Google Maps Plugin now uses two separate Google API keys instead of one. Please refer to the [documentation for further details](../configuration/plugins.md).
 
-- TODO: Hier noch einen **CHECKUP** der Konfiguration einbauen. Mindestkonfiguration.
-- TODO: SDOC Installation hinzufügen!
-
 ## 5.2
 
 ??? warning "From Two to One: Redis Unifies Caching, Retiring Memcached"