Use new Netbox version identifier. Fixes #93

[kj7ice]

Netbox deployments using the Netbox Docker image encounter an InvalidVersion error when loading a view (such as device details) that contains the QR code plugin. An example of the error:

<class 'packaging.version.InvalidVersion'>

Invalid version: '4.2.4-Docker-3.2.0'

Python version: 3.12.3
NetBox version: 4.2.4-Docker-3.2.0
Plugins:
netbox_qrcode: 0.0.16

If further assistance is required, please post to the NetBox discussion forum on GitHub.

This pull request implements the same fix I'm seeing elsewhere, such as netbox-community/netbox-topology-views#608

[cruse1977]

Looks good. thanks for this.