Dr Heater: whitespace fixup

PR #2612

custom_components/tuya_local/devices/dr_heater_dr008_thermostat.yaml

@@ -139,7 +139,7 @@ secondary_entities:
   - entity: sensor
     name: Runtime
     class: duration
-    category: diagnostic    
+    category: diagnostic
     dps:
       - id: 117
         type: integer