Persist hive light brightness for color change (#38677)

when changing the color for a hive light, keep the brightness at the
previous level.

Co-authored-by: Adam Charlton <ad5665@live.co.uk>

Co-authored-by: Adam Charlton <ad5665@live.co.uk>

homeassistant/components/hive/light.py

@@ -116,7 +116,7 @@ class HiveDeviceLight(HiveEntity, LightEntity):
             get_new_color = kwargs.get(ATTR_HS_COLOR)
             hue = int(get_new_color[0])
             saturation = int(get_new_color[1])
-            new_color = (hue, saturation, 100)
+            new_color = (hue, saturation, self.brightness)
 
         self.session.light.turn_on(
             self.node_id,