Fix incorrect icon naming.

Issue #200 and others following the same incorrect pattern

custom_components/tuya_local/devices/kyvol_e30_vacuum.yaml

@@ -162,7 +162,7 @@ secondary_entities:
   - entity: sensor
     name: Edge Brush
     category: diagnostic
-    icon: "mdi-arrow-expand-all"
+    icon: "mdi:arrow-expand-all"
     dps:
       - id: 7
         type: integer

custom_components/tuya_local/devices/poiema_one_purifier.yaml

@@ -51,7 +51,7 @@ secondary_entities:
           - dps_val: true
             icon: "mdi:hand-back-right-off"
           - dps_val: false
-            icon: "mdi-hand-back-right"
+            icon: "mdi:hand-back-right"
   - entity: switch
     name: Filter Reset
     category: config

custom_components/tuya_local/devices/wetair_wawh1210lw_humidifier.yaml

@@ -85,7 +85,7 @@ secondary_entities:
             icon: "mdi:cup-water"
             value: 50
           - dps_val: Full_water
-            icon: "mdi-cup"
+            icon: "mdi:cup"
             value: 100
 
   - entity: switch