Apply suggestions from code review

Co-authored-by: Gus Cairo <[email protected]>

Author: glbrntt

Sources/GRPCCore/Documentation.docc/Tutorials/Route-Guide/Route-Guide.tutorial

@@ -401,9 +401,9 @@
       }
 
       @Step {
-        We need to create a gRPC client for our stub. gRPC provide a with-style helper to
+        We need to create a gRPC client for our stub. gRPC provides a with-style helper to
         manage the lifecycle of the client and its transport so let's use that. We specify the
-        transport to use which and configure it appropriately. We're not using TLS so we use
+        transport to use and configure it appropriately. We're not using TLS so we use
         the `.plaintext` security transport and specify the server address and port we want to
         connect to.