In the document it refers to the config file as [envoy_config.yaml](https://github.com/envoyproxy/katacoda-scenarios/blame/master/api-based-dynamic-routing-configuration/step5.md#L4) but it should be [envoy.yaml](https://github.com/envoyproxy/katacoda-scenarios/tree/master/api-based-dynamic-routing-configuration/assets)