Changed the name of container-engine.yaml to deployment.yaml. (#1249)

Author: kurtisvg

endpoints/getting-started-grpc/README.md

@@ -141,7 +141,7 @@ Cloud account and [SDK](https://cloud.google.com/sdk/) configured.
     gcloud container clusters create my-cluster --zone=us-central1-a
     ```
 
-1. Edit `container-engine.yaml`. Replace `SERVICE_NAME`, `SERVICE_CONFIG_ID`,
+1. Edit `deployment.yaml`. Replace `SERVICE_NAME`, `SERVICE_CONFIG_ID`,
    and `GCLOUD_PROJECT` with your values:
 
    `SERVICE_NAME` is equal to hellogrpc.endpoints.GCLOUD_PROJECT.cloud.goog,
@@ -157,7 +157,7 @@ Cloud account and [SDK](https://cloud.google.com/sdk/) configured.
 1. Deploy to GKE:
 
     ```bash
-    kubectl create -f ./container-engine.yaml
+    kubectl create -f ./deployment.yaml
     ```
 
 1. Get IP of load balancer, run until you see an External IP: