Improve STT response handling

Newer versions of HASS provide different error messages than just the
previous one, so match any that begin with Sorry for errors. Also log
the response (INFO level) so we can see it.

supersensor.yaml

@@ -383,7 +383,9 @@ voice_assistant:
   on_tts_start:
     - if:
         condition:
-          lambda: return x == "Sorry, I couldn't understand that";
+        - lambda: |-
+            ESP_LOGI("tts_response", "%s", x.c_str());
+            return x.rfind("Sorry", 0) == 0;
         then:
           - logger.log: "Command failed!"
           - light.turn_on: