Digoo HAMB: adjustments to entity naming

Functions are slightly different than advertised

switch_alarm_sound = enables a beep when arming the alarm
switch_alarm_light = enables the siren (what was previously assumed above)

Issue #2399

custom_components/tuya_local/devices/digoo_hamb_alarm.yaml

@@ -66,16 +66,16 @@ secondary_entities:
           min: 0
           max: 60
   - entity: switch
-    name: Alarm sound
-    icon: "mdi:alarm-bell"
+    name: Arm beep
+    icon: "mdi:volume-low"
     category: config
     dps:
       - id: 4
         type: boolean
         name: switch
   - entity: switch
-    name: Alarm light
-    icon: "mdi:alarm-light"
+    name: Alarm siren
+    icon: "mdi:bullhorn"
     category: config
     dps:
       - id: 6