docs: for PR #4838

ACKNOWLEDGEMENTS.md

@@ -1342,3 +1342,4 @@ Further device support has been made with the assistance of users. Please consid
 - [edpenz](https://github.com/edpenz) for contributing bug fixes for the remote entity.
 - [rezendeneto](https://github.com/rezendeneto) for contributing support for Garen Kit Central garage door controller, ATorch S1BWP-T/H thermostat smartplug.
 - [tkaefer](https://github.com/tkaefer) for contributing support for Costway portable air conditioner with heating.
+- [pepitogrillo02](https://github.com/pepitogrillo02) for contributing support for Beok TR9HB-AC2.

DEVICES.md

@@ -242,7 +242,7 @@
 - Beok TCB/W38 thermostat (also sold as RT-70 under other brands)
 - Beok TGR81 thermostat _(also reported working with Myuet ME98, Avatto WT81/ME81)_
 - Beok SH-TGM50-WP, TGM50, TOL47, TR8B thermostats
-- Beok TR9B thermostat _(rebadged as Vancoo and perhaps others)_
+- Beok TR9B _(rebadged as Vancoo and perhaps others)_, TR9B-AC2 thermostats
 - BHT-002-GALW and GABW thermostats _(rebadged as many different brands)_
 - Brade MC6 thermostat _(rebadged as many different brands)_
 - Dr Heater DR-008 electric radiant floor thermostat