docs: for PR #3567 (issue #3561)

ACKNOWLEDGEMENTS.md

@@ -1010,5 +1010,5 @@ Further device support has been made with the assistance of users. Please consid
 - [dmostert](https://github.com/dmostert) for contributing improvements to ITS 45HD heat pump.
 - [infestonn](https://github.com/infestonn) for contributing support for Aeno EK1S kettle.
 - [stepsolar](https://github.com/stepsolar) for contributing improvements to KW02 video doorbell and support for RCU16 relay module.
-- [saberraz](https://github.com/saberraz) for contributing support for Prodotec PT02 air quality monitor.
+- [saberraz](https://github.com/saberraz) for contributing support for Prodotec PT02 air quality monitor, GZAIR radon gas detector.
 

DEVICES.md

@@ -991,6 +991,7 @@ port and password.
 - EPT ultrasonic 3m tank level sensor
 - Goldair Platinum SleepSmart electric blanket
 - GratKit filament dryer
+- GZAIR radon gas detector
 - Haier Nayun NY-GS-04 combustible gas alarm
 - Haoliyuen EWC02 air quality monitor
 - Haozee PS10 mmWave presence sensing light switch