docs: for PR #4567

ACKNOWLEDGEMENTS.md

@@ -1272,3 +1272,4 @@ Further device support has been made with the assistance of users. Please consid
 - [andreufontb](https://github.com/andreufontb) for assisting with support for Beca BAC-2005ALW thermostat.
 - [mxwmnn](https://github.com/mxwmnn) for contributing improvements to ZG-205W mmWave presence sensors.
 - [BarRaider](https://github.com/BarRaider) for assisting with support for Dreamlight RGBIC LED strip.
+- [diogolccsilva](https://github.com/diogolccsilva) for contributing support for Beltax BAC-1009 air conditioner.

DEVICES.md

@@ -95,6 +95,7 @@ devices # Supported
 - Arlec PA1123BKHA portable air conditioner
 - Ballu Aura air conditioner
 - Be Cool BC14KL2101F
+- Beltax BAC-1009 air conditioner
 - Brokton BRST12 air conditioner
 - Carson CB PA280
 - Cecotec ForceClima Soundless portable air conditioner