Update README.md

README.md

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 # Luxtronik
 
-## Home Assistant 2023.8.* >=
-
-Home Assistant 2023.8.* and higher is not supported by the last stable integration version!
-The latest integration version supports Home Assistant 2023.8.*, but is only a pre-release with some limitations!
+## Warning
 
 > :warning: **New Code-Base - PLEASE READ!** :warning:  
-* Backup your data before update (different config structure!) and don't use in productive environment. If you make a downgrade of this integration (<2023.9) restore your data backup (The entries for Luxtronik in ./storage/core.config_entries + core.device_registry + core.entity_registry should be enough.)! If not you get double entities!
+* Backup your data before update (different config structure!). If you make a downgrade of this integration (<2023.9) restore your data backup (The entries for Luxtronik in ./storage/core.config_entries + core.device_registry + core.entity_registry should be enough.)! If not you get double entities!
 * This release has no more language selection. The HA backend language is used.
 * Some entities which can not detected automaticly are hidden or disabled by default. In the devices you can find them and activate it. Please check this list before creating issues with entity whiches.
 * The RBE Room Temperature Sensor is currently not implemented.