[Bug] Zigbee2MQTT version logged very often
**Describe the bug**
Recently updated Zigbee2MQTT to v1.22.0 and noticed in my Homebridge log it shows an entry each second with this version number.

```
[11/22/2021, 7:52:45 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:46 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:47 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:48 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:49 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:50 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:51 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:52 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:53 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:54 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:55 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:56 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:57 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
[11/22/2021, 7:52:58 AM] [zigbee2mqtt] Using Zigbee2MQTT v1.22.0 (identified via zigbee2mqtt/bridge/info)
```

Suggest to only log the version number when it has changed.

**Versions used**
Please provide the version of the following pieces of software:
 - This plugin v1.6.1
 - Homebridge v1.3.6
 - Zigbee2MQTT v1.22.0