Beok TGR81: redirect to dp name, not id.

Issue #1120

custom_components/tuya_local/devices/beok_tgr81_thermostat_c.yaml

@@ -183,7 +183,7 @@ secondary_entities:
           - dps_val: "70"
             value: "7 days"
           - dps_val: null
-            value_redirect: 102
+            value_redirect: alt
       - id: 102
         type: string
         name: alt