Improve deCONZ switch platform documentation (home-assistant#5986)

Author: Kane610

source/_components/switch.deconz.markdown

@@ -15,10 +15,12 @@ ha_iot_class: "Local Push"
 
 See the [deCONZ main component](/components/deconz/) for configuration instructions.
 
-The `Entity Id` names will be `switch.device_name`, where `device_name` is defined in deCONZ.
+Switches are devices like power plugs and sirens.
 
 Note that devices in the switch platform identify as lights, so there is a manually curated list that defines which "lights" are switches.
 
+The `Entity Id` names will be `switch.device_name`, where `device_name` is defined in deCONZ.
+
 #### {% linkable_title Verified supported switches %}
 
 - Innr SP120