organization_url doesn't appear to be used anywhere - remove from
examples and module to avoid confusion.
$ grep -ri organization_url caf-terraform-landingzones caf-terraform-landingzones-starter
caf-terraform-landingzones/caf_solution/add-ons/azure_devops_v1/scenario/200-contoso_demo/projects.tfvars:organization_url = "https://dev.azure.com/azure-terraform"
caf-terraform-landingzones/caf_solution/add-ons/azure_devops_v1/variables.tf:variable "organization_url" {