update CHANGELOG.md to include #7916

CHANGELOG.md

@@ -23,11 +23,12 @@ IMPROVEMENTS:
 
 BUG FIXES:
 
-* `azurerm_automation_runbook` - allow `publish_content_link` resource to not exist [GH-7824]
+* `azurerm_automation_runbook` - allow `publish_content_link` resource to not be set [GH-7824]
 * `azurerm_api_management_named_value` - the `value` has been marked as sensitive to hide secret values [GH-7819]
+* `azurerm_cognitive_account` - allow `qname_runtime_endpoint` to not be set [GH-7916]
 * `azurerm_iothub_dps` - the only valid value for the `sku` property for the API is now `S1` [GH-7847]
 * `azurerm_eventgrid_event_subscription` - deprecate the `topic_name` as it is now readonly in the API [GH-7871]
-* `azurerm_kubernetes_cluster` - Updates no longer fail when using managed AAD integration [GH-7874]
+* `azurerm_kubernetes_cluster` - updates will no longer fail when using managed AAD integration [GH-7874]
 
 ## 2.20.0 (July 23, 2020)