Beok TGR81: Correct product info

The product info became confused somehow. When Avatto ME81 was
initially added as a compatible device, the ids somehow became switched.
But also the wrong name got assigned to the other id. Looking back at the
original report, it should have been Avatto WT200, not WT81.

Finally, there were detection issues for ME81, so another new device
report got filed for it later, and a seperate config made (even though it
could have handled by making a couple of dps optional).

Based on PR #1742

custom_components/tuya_local/devices/beok_tgr81_thermostat_c.yaml

@@ -1,9 +1,7 @@
 name: Beok TGR81 thermostat
 products:
-  - id: gogb05wrtredz3bs
-    name: Avatto WT81 thermostat
   - id: gw173aldekvpzalg
-    name: Avatto ME81 thermostat
+    name: Avatto WT200W-EH
 primary_entity:
   entity: climate
   translation_only_key: thermostat