Fix Tesla attribute refreshing (#42257)

* Fix Tesla attribute refreshing

* Remove extraneous copy

homeassistant/components/tesla/__init__.py

@@ -282,7 +282,7 @@ class TeslaDevice(CoordinatorEntity):
     @property
     def device_state_attributes(self):
         """Return the state attributes of the device."""
-        attr = self._attributes.copy()
+        attr = self._attributes
         if self.tesla_device.has_battery():
             attr[ATTR_BATTERY_LEVEL] = self.tesla_device.battery_level()
             attr[ATTR_BATTERY_CHARGING] = self.tesla_device.battery_charging()
@@ -310,4 +310,5 @@ class TeslaDevice(CoordinatorEntity):
         This assumes the coordinator has updated the controller.
         """
         self.tesla_device.refresh()
+        self._attributes = self.tesla_device.attrs.copy()
         self.async_write_ha_state()