add doc

Author: yfodil

docs/resources/instance_server.md

@@ -254,6 +254,8 @@ attached to the server. Updates to this field will trigger a stop/start of the s
 
 - `replace_on_type_change` - (Defaults to false) If true, the server will be replaced if `type` is changed. Otherwise, the server will migrate.
 
+- `protected` - (Optional) Set to true to activate server protection option.
+
 - `zone` - (Defaults to [provider](../index.md#zone) `zone`) The [zone](../guides/regions_and_zones.md#zones) in which the server should be created.
 
 - `project_id` - (Defaults to [provider](../index.md#project_id) `project_id`) The ID of the project the server is associated with.

internal/services/instance/server.go

@@ -834,7 +834,7 @@ func ResourceInstanceServerUpdate(ctx context.Context, d *schema.ResourceData, m
 
 	if d.HasChange("protected") {
 		serverShouldUpdate = true
-		updateRequest.Protected = scw.BoolPtr(d.Get("protected").(bool))
+		updateRequest.Protected = types.ExpandBoolPtr(d.Get("protected").(bool))
 	}
 
 	if d.HasChanges("additional_volume_ids", "root_volume") {