typo fix (#12700)

* typo fix

"greater" should be "greeter"

* Proper noun

aspnetcore/tutorials/grpc/grpc-start.md

@@ -4,7 +4,7 @@ author: juntaoluo
 description: This tutorial shows how to create a gRPC Service and gRPC client on ASP.NET Core. Learn how to create a gRPC Service project, edit a proto file, and add a duplex streaming call.
 monikerRange: '>= aspnetcore-3.0'
 ms.author: johluo
-ms.date: 5/30/2019
+ms.date: 06/05/2019
 uid: tutorials/grpc/grpc-start
 ---
 # Tutorial: Create a gRPC client and server in ASP.NET Core
@@ -224,7 +224,7 @@ dotnet add GrpcGreeterClient.csproj package Grpc.Tools
 
 Build the client project to trigger the generation of the C# client assets.
 
-### Create the greater client
+### Create the Greeter client
 
 Build the project to create the types in the **Greeter** namespace. The `Greeter` types are generated automatically by the build process.
 
@@ -234,14 +234,14 @@ Update the gRPC client *Program.cs* file with the following code:
 
 *Program.cs* contains the entry point and logic for the gRPC client.
 
-The greater client is created by:
+The Greeter client is created by:
 
 * Instantiating a `Channel` containing the information for creating the connection to the gRPC service.
-* Using the `Channel` to construct the greater client:
+* Using the `Channel` to construct the Greeter client:
 
 [!code-cs[](~/tutorials/grpc/grpc-start/sample/GrpcGreeterClient/Program.cs?name=snippet&highlight=4-6)]
 
-The greater client calls the asynchronous `SayHello` method. The result of the `SayHello` call is displayed:
+The Greeter client calls the asynchronous `SayHello` method. The result of the `SayHello` call is displayed:
 
 [!code-cs[](~/tutorials/grpc/grpc-start/sample/GrpcGreeterClient/Program.cs?name=snippet&highlight=7-9)]