updating to include #4663

CHANGELOG.md

@@ -17,6 +17,7 @@ IMPROVEMENTS:
 * devspace: updating to API version `2019-04-01` [GH-4597]
 * frontdoor: updating to use API version `2019-04-01` [GH-4609]
 * provider: switching to use the Provider SDK from `github.com/hashicorp/terraform-provider-sdk` [GH-4474]
+* provider: sending Microsoft's Terraform Partner ID in the user agent if a custom Partner ID isn’t specified [GH-4663]
 * Data Source: `azurerm_lb_backend_address_pool` - exposing `backend_ip_configurations` [GH-4605]
 * `azurerm_cosmosdb_mongo_collection` - add support for the `throughput` property [GH-4467]
 * `azurerm_firewall` - support for `zones` [GH-4670]