fixed some typos
diff --git a/examples/tips/client.h b/examples/tips/client.h
index 83e7911..152a2a3 100644
--- a/examples/tips/client.h
+++ b/examples/tips/client.h
@@ -48,6 +48,6 @@
   std::unique_ptr<tech::pubsub::PublisherService::Stub> stub_;
 };
 
-}  // namesapce tips
+}  // namespace tips
 }  // namespace examples
 }  // namespace grpc