Eurom Sani Towel radiator: fix type of hvac_action

Mapping dps_val are boolean, but type is marked as string.
Probably the original author added this after the device was already
configured, so did not experience the mismatch this causes, though they
did file issue #1819 which is probably another side effect.

Issue #2529

custom_components/tuya_local/devices/eurom_sani_bathroom_towel_radiator.yaml

@@ -50,7 +50,7 @@ primary_entity:
       optional: true
       hidden: true
     - id: 101
-      type: string
+      type: boolean
       name: hvac_action
       mapping:
         - dps_val: true