net-mgmt/netbox: Update to 2.7.9

Changelog:

Enhancements:

• Enumerate ChoiceField type and value in API
• Extend upgrade script to clear expired user sessions
• Add dynamic lookup expressions for all filters
• Allow negative voltage for DC power feeds
• Allow filtering device component list views by type
• Add MRJ21 port and cable types
• Include device name in tooltip on rack elevations
• Add 10-inch option for rack width

Bug Fixes:

• Fix incorrect schema definition of int type choicefields
• Fix filtering of clusters by tenant
• Fix label on export button for device types
• Include A/Z termination sites in provider circuits table
• Fix assignment of parent LAG during interface bulk edit
• Fix bulk creation of objects with custom fields via REST API
• Pass "commit" argument when executing scripts via REST API
• Fix exception when deleting device type with components
• Fix toggling of device images for all racks in elevations view

https://github.com/netbox-community/netbox/releases/tag/v2.7.9