net-mgmt/netbox: Update to 3.1.8

Changelog:

Enhancements:

• Linkify devices on the far side of a rack elevation
• Embiggen configuration form fields for banner message content
• Add full username column to changelog table
• Enable tab completion for nbshell

Bug Fixes:

• Implement replaceAll string utility function to improve browser compatibility
• Null date columns should return empty strings during CSV export
• Fix display of VC members when position is zero
• Include option to connect a rear port to a console port
• Fix errant table configuration key available_columns
• Show contact assignment counts in global search results
• Object change log tables should honor user's configured preferences
• Fix tag filter on config context list filter form
• Display validation error when attempting to assign VLANs to interface with no mode during bulk edit
• Fix bulk editing for certain custom link, webhook, and journal entry fields

https://github.com/netbox-community/netbox/releases/tag/v3.1.8