fix (essentials_wall_thermostat): typo fix

custom_components/tuya_local/devices/essentials_wall_thermostat.yaml

@@ -47,7 +47,7 @@ entities:
         mapping:
           - dps_val: open
             value: heating
-          - dps_xval: close
+          - dps_val: close
             value: idle
 
   - entity: switch