[htu21d] Fix set_heater action reading wrong config key (#15378)

esphome/components/htu21d/sensor.py

@@ -118,6 +118,6 @@ async def set_heater_level_to_code(config, action_id, template_arg, args):
 async def set_heater_to_code(config, action_id, template_arg, args):
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
-    status_ = await cg.templatable(config[CONF_LEVEL], args, bool)
+    status_ = await cg.templatable(config[CONF_STATUS], args, bool)
     cg.add(var.set_status(status_))
     return var

tests/components/htu21d/common.yaml

@@ -1,5 +1,6 @@
 sensor:
   - platform: htu21d
+    id: htu21d_sensor
     i2c_id: i2c_bus
     model: htu21d
     temperature:
@@ -9,3 +10,14 @@ sensor:
     heater:
       name: Heater
     update_interval: 15s
+
+button:
+  - platform: template
+    name: "Test HTU21D Actions"
+    on_press:
+      - htu21d.set_heater:
+          id: htu21d_sensor
+          status: true
+      - htu21d.set_heater_level:
+          id: htu21d_sensor
+          level: 5