Calex heater: use a generic top level name

custom_components/tuya_local/devices/calex_convector_heater.yaml

@@ -1,4 +1,4 @@
-name: Calex Smart Convector Heater
+name: Convection heater
 products:
   - id: yqnv4v88805rpkr1
     name: Calex Smart Heater