net-mgmt/netbox: Update to 3.1.6

Changelog since 3.0.12:

It contains many bugfixes/enhancements and the following new features:

• Contact Objects
• Wireless Networks
• Dynamic Configuration Updates
• First Hop Redundancy Protocol (FHRP) Groups
• Conditional Webhooks
• Interface Bridging
• Multiple ASNs per Site
• Single Sign-On (SSO) Authentication

https://netbox.readthedocs.io/en/stable/release-notes/version-3.1/

MFH: No (feature release)