net-mgmt/netbox: Update to 3.4.7

Changelog:

Enhancements:
* Automatically set the scheduled time when executing reports/scripts
  at a recurring interval
* Add fieldset support for custom script forms
* Use SSID for representing wireless links, if set
* Support designating multiple backends via REMOTE_AUTH_BACKEND
  config parameter
* Improve error reporting for duplicate CSV column headings
* Enable VDC assignment during bulk import/edit of interfaces

Bug Fixes:
* Include parameters when exporting saved filters
* Fix cloning of saved filters
* Remove erroneous 802.3az PoE type
* Correct URL for tags in route targets list
* Enable cloning of export templates
* Restore missing description field on virtual chassis form
* Correct display of zero values for virtual chassis member priority
* Enable cloning of tags
* Enable cloning of config contexts

https://github.com/netbox-community/netbox/releases/tag/v3.4.7