Update hello-world tutorial

Author: glbrntt

Sources/GRPCCore/Documentation.docc/Tutorials/Hello-World/Hello-World.tutorial

@@ -18,7 +18,7 @@
     repository by running the following command in a terminal:
 
     ```console
-    git clone https://github.com/grpc/grpc-swift
+    git clone --branch 2.0.0-beta.1 https://github.com/grpc/grpc-swift
     ```
 
     You then need to change directory to the `Examples/hello-world` directory of the cloned

Sources/GRPCCore/Documentation.docc/Tutorials/Hello-World/Resources/hello-world-sec04-step01.swift

@@ -1,11 +1,11 @@
-struct Greeter: Helloworld_GreeterServiceProtocol {
+struct Greeter: Helloworld_Greeter.SimpleServiceProtocol {
   func sayHello(
-    request: ServerRequest<Helloworld_HelloRequest>,
+    request: Helloworld_HelloRequest,
     context: ServerContext
-  ) async throws -> ServerResponse<Helloworld_HelloReply> {
+  ) async throws -> Helloworld_HelloReply {
     var reply = Helloworld_HelloReply()
     let recipient = request.message.name.isEmpty ? "stranger" : request.message.name
     reply.message = "Hello, \(recipient)"
-    return ServerResponse(message: reply)
+    return reply
   }
 }

Sources/GRPCCore/Documentation.docc/Tutorials/Hello-World/Resources/hello-world-sec04-step02.swift

@@ -1,21 +1,21 @@
-struct Greeter: Helloworld_GreeterServiceProtocol {
+struct Greeter: Helloworld_Greeter.SimpleServiceProtocol {
   func sayHello(
-    request: ServerRequest<Helloworld_HelloRequest>,
+    request: Helloworld_HelloRequest,
     context: ServerContext
-  ) async throws -> ServerResponse<Helloworld_HelloReply> {
+  ) async throws -> Helloworld_HelloReply {
     var reply = Helloworld_HelloReply()
     let recipient = request.message.name.isEmpty ? "stranger" : request.message.name
     reply.message = "Hello, \(recipient)"
-    return ServerResponse(message: reply)
+    return reply
   }
 
   func sayHelloAgain(
-    request: ServerRequest<Helloworld_HelloRequest>,
+    request: Helloworld_HelloRequest,
     context: ServerContext
-  ) async throws -> ServerResponse<Helloworld_HelloReply> {
+  ) async throws -> Helloworld_HelloReply {
     var reply = Helloworld_HelloReply()
     let recipient = request.message.name.isEmpty ? "stranger" : request.message.name
     reply.message = "Hello again, \(recipient)"
-    return ServerResponse(message: reply)
+    return reply
   }
 }

Sources/GRPCCore/Documentation.docc/Tutorials/Hello-World/Resources/hello-world-sec04-step03.swift

@@ -1,3 +1,3 @@
-let greeter = Helloworld_GreeterClient(wrapping: client)
+let greeter = Helloworld_Greeter.Client(wrapping: client)
 let reply = try await greeter.sayHello(.with { $0.name = self.name })
 print(reply.message)

Sources/GRPCCore/Documentation.docc/Tutorials/Hello-World/Resources/hello-world-sec04-step04.swift

@@ -1,4 +1,4 @@
-let greeter = Helloworld_GreeterClient(wrapping: client)
+let greeter = Helloworld_Greeter.Client(wrapping: client)
 let reply = try await greeter.sayHello(.with { $0.name = self.name })
 print(reply.message)