docs(server-communication): fix "app/app.module.ts" typo

closes #2283

Author: benasocj

public/docs/ts/latest/guide/server-communication.jade

@@ -690,7 +690,7 @@ block redirect-to-web-api
       The `forRoot` method name is a strong reminder that you should only call the `InMemoryWebApiModule` _once_
       while setting the metadata for the root `AppModule`. Don't call it again!.
 :marked
-  Here is the revised (and final) version of <span ngio-ex>app/app.module.ts></span> demonstrating these steps.
+  Here is the revised (and final) version of <span ngio-ex>app/app.module.ts</span> demonstrating these steps.
 
 +makeExcerpt('app/app.module.ts')