Fix typo in verified routes guide (#5777)

guides/routing.md

@@ -61,7 +61,7 @@ get "/", PageController, :home
 >
 >   * They define the routing engine, used on every request, to choose which controller to dispatch the request to. Thanks to macros, Phoenix compiles all of your routes to a huge case-statement with pattern matching rules, which is heavily optimized by the Erlang VM
 >
->   * For each route you define, we also define metadata to implement `Phoenix.VerifiedRoutes`. As we will soon learn, verified routes allows to us to reference any route as if it is a plain looking string, except it is verified by the compiler to be valid (making it much harder to ship broken links, forms, mails, etc to production)
+>   * For each route you define, we also define metadata to implement `Phoenix.VerifiedRoutes`. As we will soon learn, verified routes allow us to reference any route as if it were a plain looking string, except that it is verified by the compiler to be valid (making it much harder to ship broken links, forms, mails, etc to production)
 >
 > In other words, the router relies on macros to build applications that are faster and safer. Also remember that macros in Elixir are compile-time only, which gives plenty of stability after the code is compiled. As we will learn next, Phoenix also provides introspection for all defined routes via `mix phx.routes`.