update retry instructions to be clearer
update retry instructions to be clearer

PiperOrigin-RevId: 233437833

GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare,GoogleCloudPlatform/healthcare