Fix lint and syntax issues in json and yaml files

custom_components/tuya_local/devices/beca_bhp6000_thermostat_f.yaml

@@ -65,4 +65,3 @@ secondary_entities:
       - id: 1
         name: switch
         type: boolean
-

custom_components/tuya_local/icons.json

@@ -29,7 +29,7 @@
             }
         },
         "light": {
-            "backlight" {
+            "backlight": {
                 "default": "mdi:television-ambient-light"
             },
             "display": {