Goldair SmartSleep: fix products tag

custom_components/tuya_local/devices/goldair_smartsleep_bedwarmer.yaml

@@ -1,5 +1,5 @@
 name: Electric blanket
-product:
+products:
   - id: mqcffjumdpuahxmi
     name: Goldair Platinum SmartSleep
 primary_entity: