fix(beok_tol47_thermostat): restrict climate to maximum_temperature

This config predates the addition of min and max temperature dps in the climate
entity, and it isn't obvious whether the setting is a maximum limit for the
thermostat, or some alarm threshold, so was not changed when that was added.

Issue #6003

custom_components/tuya_local/devices/beok_tol47_thermostat.yaml

@@ -52,6 +52,9 @@ entities:
             value: idle
           - dps_val: "1"
             value: heating
+      - id: 21
+        type: integer
+        name: max_temperature
   - entity: lock
     translation_key: child_lock
     category: config