Update changelog for #4953

CHANGELOG.md

@@ -70,6 +70,7 @@ BUG FIXES:
 * `azurerm_api_management_api_policy` - sending `policy` as Raw XML [GH-4140]
 * `azurerm_bastion_host` - matching the validation for `name` used by Azure [GH-4766]
 * `azurerm_bastion_host` - support for hyphens in the `name` field within the `ip_configuration` block [GH-4814]
+* `azurerm_container_group` - prevent empty string from being passed into `commands` (#4953)
 * `azurerm_eventhub_namespace` - deprecating the `kafka_enabled` sproperty as it is now managed by Azure [GH-4743]
 * `azurerm_kubernetes_cluster` - support for conditional updates / `ignore_changes` on the `node_count` field [GH-4898]
 * `azurerm_kubernetes_cluster` - working around a case sensitivity bug when upgrading clusters via the Azure Portal [GH-4929]