Update azure docs for config.go
Update azure docs for config.go

add missing docs fields

Co-Authored-By: Megan Marsh <22707ea99d5594120b3d6bd53b6c190589d34266@users.noreply.github.com>

dave2/packer,grubernaut/packer,paulmey/packer,paulmey/packer,rnaveiras/packer,mitchellh/packer,ricardclau/packer,paulmey/packer,timsutton/packer,grubernaut/packer,timsutton/packer,mitchellh/packer,mitchellh/packer,grubernaut/packer,timsutton/packer,dave2/packer,mitchellh/packer,timsutton/packer,rnaveiras/packer,pecigonzalo/packer,paulmey/packer,ricardclau/packer,pecigonzalo/packer,paulmey/packer,rnaveiras/packer,pecigonzalo/packer,rnaveiras/packer,hashicorp/packer,timsutton/packer,pecigonzalo/packer,hashicorp/packer,hashicorp/packer,ricardclau/packer,rnaveiras/packer,timsutton/packer,mitchellh/packer,paulmey/packer,rnaveiras/packer,grubernaut/packer,ricardclau/packer,grubernaut/packer,dave2/packer,dave2/packer,grubernaut/packer,dave2/packer,ricardclau/packer,hashicorp/packer,dave2/packer,ricardclau/packer