Add code comment in SamsungTV (#68841)

homeassistant/components/samsungtv/bridge.py

@@ -459,6 +459,9 @@ class SamsungTVWSBridge(
 
     async def async_is_on(self) -> bool:
         """Tells if the TV is on."""
+        # On some TVs, opening a websocket turns on the TV
+        # so first check "PowerState" if device_info has it
+        # then fallback to default, trying to open a websocket
         if self._get_device_spec("PowerState") is not None:
             LOGGER.debug("Checking if TV %s is on using device info", self.host)
             # Ensure we get an updated value