r/monitor_diagnostic_setting: fixing the field names

Fixes #2571

website/docs/r/monitor_diagnostic_setting.html.markdown

@@ -61,29 +61,29 @@ The following arguments are supported:
 
 * `target_resource_id` - (Required) The ID of an existing Resource on which to configure Diagnostic Settings. Changing this forces a new resource to be created.
 
-* `event_hub_name` - (Optional) Specifies the name of the Event Hub where Diagnostics Data should be sent. Changing this forces a new resource to be created.
+* `eventhub_name` - (Optional) Specifies the name of the Event Hub where Diagnostics Data should be sent. Changing this forces a new resource to be created.
 
 -> **NOTE:** If this isn't specified then the default Event Hub will be used.
 
-* `event_hub_authorization_rule_id` - (Optional) Specifies the ID of an Event Hub Namespace Authorization Rule used to send Diagnostics Data. Changing this forces a new resource to be created.
+* `eventhub_authorization_rule_id` - (Optional) Specifies the ID of an Event Hub Namespace Authorization Rule used to send Diagnostics Data. Changing this forces a new resource to be created.
 
--> **NOTE:** One of `event_hub_authorization_rule_id`, `log_analytics_workspace_id` and `storage_account_id` must be specified.
+-> **NOTE:** One of `eventhub_authorization_rule_id`, `log_analytics_workspace_id` and `storage_account_id` must be specified.
 
 * `log` - (Optional) One or more `log` blocks as defined below.
 
 -> **NOTE:** At least one `log` or `metric` block must be specified.
 
 * `log_analytics_workspace_id` - (Optional) Specifies the ID of a Log Analytics Workspace where Diagnostics Data should be sent. Changing this forces a new resource to be created.
 
--> **NOTE:** One of `event_hub_authorization_rule_id`, `log_analytics_workspace_id` and `storage_account_id` must be specified.
+-> **NOTE:** One of `eventhub_authorization_rule_id`, `log_analytics_workspace_id` and `storage_account_id` must be specified.
 
 * `metric` - (Optional) One or more `metric` blocks as defined below.
 
 -> **NOTE:** At least one `log` or `metric` block must be specified.
 
 * `storage_account_id` - (Optional) With this parameter you can specify a storage account which should be used to send the logs to. Parameter must be a valid Azure Resource ID. Changing this forces a new resource to be created.
 
--> **NOTE:** One of `event_hub_authorization_rule_id`, `log_analytics_workspace_id` and `storage_account_id` must be specified.
+-> **NOTE:** One of `eventhub_authorization_rule_id`, `log_analytics_workspace_id` and `storage_account_id` must be specified.
 
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