net-mgmt/netbox: Update to 2.5.8

Changelog:

Enhancements:

• Printer friendly CSS

Bug Fixes:

• Correct documentation for VM interface serializer
• Fix endpoint grouping in API docs
• Fix filtering of sites/devices/VMs by multiple regions
• Provider filter form's site field should be blank by default
• Enforce deterministic ordering of device components returned by API
• Exclude circuit terminations from API interface connections endpoint
• Allow CSV import of prefixes/IPs to VRF without an RD assigned
• Record the deletion of an IP address in the changelog of its parent interface (if any)
• Added the slug field to the Tenant filter for use in the API and search function
• Remove trailing slashes to fix root/template paths on Windows
• Prevent exception when exporting inventory items belonging to unnamed devices
• Increase ExportTemplate mime_type field length
• Accept null cable length_unit via API
• Improve ContentTypeField serializer to elegantly handle invalid data
• Add delete button to tag view
• Improve rendering time for API docs
• Correct CSS class assignment on color picker
• Fix logging of unlabeled cable ID on cable deletion
• Fix pagination page length for rack elevations

https://github.com/digitalocean/netbox/blob/v2.5.8/CHANGELOG.md

Approved by: miwi (mentor)
Differential Revision: https://reviews.freebsd.org/D19556