Also correct legacy_anna_2 data-json

Author: bouwew

tests/data/anna/legacy_anna_2.json

@@ -53,6 +53,7 @@
     },
     "sensors": {
       "water_temperature": 54,
+      "dhw_temperature": 0.0,
       "intended_boiler_temperature": 0,
       "modulation_level": 0,
       "return_temperature": 0,