fix(vevor_selfcleaning_litterbox): missing colon

custom_components/tuya_local/devices/vevor_selfcleaning_litterbox.yaml

@@ -263,7 +263,7 @@ entities:
             value: occupied
       - id: 109
         type: string
-        optional true
+        optional: true
         name: trigger
   - entity: select
     name: Weight unit