Fix typo in overview.md (dotnet#21347)

aspnetcore/mvc/overview.md

@@ -71,7 +71,7 @@ ASP.NET Core MVC includes the following:
 
 ASP.NET Core MVC is built on top of [ASP.NET Core's routing](../fundamentals/routing.md), a powerful URL-mapping component that lets you build applications that have comprehensible and searchable URLs. This enables you to define your application's URL naming patterns that work well for search engine optimization (SEO) and for link generation, without regard for how the files on your web server are organized. You can define your routes using a convenient route template syntax that supports route value constraints, defaults and optional values.
 
-*Convention-based routing* enables you to globally define the URL formats that your application accepts and how each of those formats maps to a specific action method on given controller. When an incoming request is received, the routing engine parses the URL and matches it to one of the defined URL formats, and then calls the associated controller's action method.
+*Convention-based routing* enables you to globally define the URL formats that your application accepts and how each of those formats maps to a specific action method on a given controller. When an incoming request is received, the routing engine parses the URL and matches it to one of the defined URL formats, and then calls the associated controller's action method.
 
 ```csharp
 routes.MapRoute(name: "Default", template: "{controller=Home}/{action=Index}/{id?}");