docs: for PR #4880

ACKNOWLEDGEMENTS.md

@@ -1348,3 +1348,4 @@ Further device support has been made with the assistance of users. Please consid
 - [martinsotir](https://github.com/martinsotir) for contributing support for Dekala Lumos sunrise alarm clock.
 - [aicbaicb](https://github.com/aicbaicb) for contributing support for Sajun steam room.
 - [pro-logic](https://github.com/pro-logic) for contributing support for Eglo ceiling fan with light, which was merged with the non-light variant.
+- [ludook](https://github.com/ludook) for contributing support for Beok BAC-009 smart knob zigbee thermostat.

DEVICES.md

@@ -1370,6 +1370,7 @@ entity types as sub devices.
 - Aubess temperature and humidity sensor
 - Avatto TRV06 radiator valve (also sold branded as Thaleos)
 - Avatto ZWT198 thermostat
+- Beok BAC-009 smart knob thermostat
 - Generic Zigbee Door Sensor
 - Haozee RB-SRAIN01 solar rain sensor
 - Haozee ZG-302ZM mmWave presence dual light switch