docs: for PR #5089

ACKNOWLEDGEMENTS.md

@@ -803,3 +803,4 @@ Further device support has been made with the assistance of users. Please consid
 - [nakatomi845](https://github.com/nakatomi845) for contributing support for Zencar Wpro 32A 3P EV charger.
 - [DomJoke](https://github.com/DomJoke) for contributing support for Hiniso dehumidifier.
 - [c3p0vsr2d2](https://github.com/c3p0vsr2d2) for contributing support for KMC 4-outlet wall tap with energy monitoring.
+- [mcguires5](https://github.com/mcguires5) for contributing support for the red-blue variant of Touchstone Sideline fireplace.

DEVICES.md

@@ -85,7 +85,7 @@
 - Taurus Agadir Connect oil column heaters
 - Tecxerllon 1500W panel heater
 - Termoplaza 900 panel heater
-- Touchstone Sideline electric fireplace
+- Touchstone Sideline electric fireplaces
 - TyloHelo SaunaLogic2 sauna controller
 - Valehaus SYZN119 towel warmer
 - Vonroc GPH-XA-HEMAN heater