docs(glossary): fix app module filename (#2613)

Author: simon-xiong-ca

public/docs/ts/latest/glossary.jade

@@ -44,7 +44,7 @@ block includes
       An Angular module identifies the components, directives, and pipes that the application uses along with the list of external Angular modules that the application needs, such as `FormsModule`.
 
       Every Angular application has an application root module class. By convention, the class is
-      called `AppModule` and resides in a file named `app.component.ts`.
+      called `AppModule` and resides in a file named `app.module.ts`.
 
       For details and examples, see the [Angular Module](!{docsLatest}/guide/ngmodule.html) page.