Add breaking change alert for PiperTTS (#1873)

Refs openhab/openhab-addons#20201.

Signed-off-by: Florian Hotze <dev@florianhotze.com>

Author: florian-h05

distributions/openhab/src/main/resources/bin/update.lst

@@ -198,6 +198,7 @@ ALERT;SMHI Binding: Due to updates to SMHI's API, the channel ids have changed.
 
 [5.2.0]
 ALERT;Corona Stats Binding: Due to EOL of the website, this add-on has been removed.
+ALERT;Piper TTS Voice: Voice UIDs now contain the model quality. You need to setup your default voice again and adjust your rules & scripts for the changed voice UIDs.
 
 [[PRE]]
 [2.2.0]