Run updated code generation on the updated sample

example/hello_world/service_twirp.rb

@@ -6,11 +6,11 @@ module Example
   module HelloWorld
     class HelloWorldService < ::Twirp::Service
       package 'example.hello_world'
-      service 'HelloWorld'
+      service 'HelloWorldService'
       rpc :Hello, HelloRequest, HelloResponse, :ruby_method => :hello
     end
 
-    class HelloWorldClient < ::Twirp::Client
+    class HelloWorldServiceClient < ::Twirp::Client
       client_for HelloWorldService
     end
   end