change test to slider for disk create

app/UI/Disk/Forms/UpdateForm.php

@@ -64,7 +64,7 @@ class UpdateForm extends BaseForm implements ClientArea
         logModuleCall(
             'proxmoxCloud',
             __FUNCTION__,
-            $field,
+            $field->getData(),
             'Debug',
             $vm->getHardDisks()
         );