Update venstar.markdown for config_flow (#19888)

source/_integrations/venstar.markdown

@@ -36,16 +36,9 @@ Note - Please ensure that you update your thermostat to the latest firmware. Ini
 
 Local API mode needs to be enabled via the thermostat's *Menu > WiFi > Local API Options > Local API - ON*
 
-To set it up, add the following information to your `configuration.yaml` file:
+{% include integrations/config_flow.md %}
 
-```yaml
-# Example configuration.yaml entry
-climate:
-  - platform: venstar
-    host: IP_OR_HOSTNAME_OF_THERMOSTAT
-```
-
-{% configuration %}
+{% configuration_basic %}
 host:
   description: Address of your thermostat, e.g., 192.168.1.32.
   required: true
@@ -77,19 +70,4 @@ humidifier:
   required: false
   type: boolean
   default: true
-{% endconfiguration %}
-
-## Full configuration sample
-
-```yaml
-# Example configuration.yaml entry
-climate:
-  - platform: venstar
-    host: IP_OR_HOSTNAME_OF_THERMOSTAT
-    ssl: true
-    username: OPTIONAL_AUTH_USER_HERE
-    password: OPTIONAL_AUTH_PASS_HERE
-    pin: LOCKSCREEN_PIN
-    timeout: 5
-    humidifier: false
-```
+{% endconfiguration_basic %}