docs: for PR #3482

ACKNOWLEDGEMENTS.md

@@ -980,3 +980,4 @@ Further device support has been made with the assistance of users. Please consid
 - [l2jalbe](https://github.com/l2jalbe) for assisting with support for Blitzwill ceiling fan with light.
 - [rigibe](https://github.com/rigibe) for contributing support for Aubess 3-gang switch.
 - [camillePernoud](https://github.com/camillePernoud) for contributing support for Moray level sensor, which was merged with EPT level sensor.
+- [Keith-H-T](https://github.com/Keith-H-T) for contributing support for Herschel XLS T-PL plugin thermostat.

DEVICES.md

@@ -197,6 +197,7 @@
 - EZAIoT R9Lite thermostat
 - EZAIoT thermostat smartplug
 - Garza thermostat
+- Herschel XLS T-PL plugin thermostat
 - Hysen HY02TP, HY08ACF, HY08WE-2, HY101RF thermostats
 - Inkbird IPT-2CH v2.0 reptile thermostat
 - Inkbird ITC306A, ITC308 thermostat smartplugs