Release for Netbox 4.3.0

[berendt]

Proposed functionality

Netbox 4.3.0 was release a few days ago (https://github.com/netbox-community/netbox/releases/tag/v4.3.0). This makes it necessary to also do a 4.3.0 release for netbox-initializers.

Use case

/opt/netbox/netbox/netbox/settings.py:849: UserWarning: Unable to load plugin netbox_initializers: Plugin netbox_initializers requires NetBox maximum version 4.2.99 (current: 4.3.0).

[mr1716]

@berendt relevant discussion here: Netbox Intializers Discussion

[tobiasge]

Closed with #115