Add unit to 'charging_level_hv' bwm_connected_drive sensor (#26861)

* Update sensor.py

Add unit to charging_level_hv, which allows correct graphing in UI

* Update sensor.py

Add space after #

homeassistant/components/bmw_connected_drive/sensor.py

@@ -24,6 +24,8 @@
     "remaining_fuel": ["mdi:gas-station", VOLUME_LITERS],
     "charging_time_remaining": ["mdi:update", "h"],
     "charging_status": ["mdi:battery-charging", None],
+    # No icon as this is dealt with directly as a special case in icon()
+    "charging_level_hv": [None, "%"],
 }
 
 ATTR_TO_HA_IMPERIAL = {
@@ -35,6 +37,8 @@
     "remaining_fuel": ["mdi:gas-station", VOLUME_GALLONS],
     "charging_time_remaining": ["mdi:update", "h"],
     "charging_status": ["mdi:battery-charging", None],
+    # No icon as this is dealt with directly as a special case in icon()
+    "charging_level_hv": [None, "%"],
 }