Update localization.md

docs/en/framework/fundamentals/localization.md

@@ -183,7 +183,7 @@ public class MyService : ITransientDependency
 }
 ````
 
-##### Format Arguments
+### Format Arguments
 
 Format arguments can be passed after the localization key. If your message is `Hello {0}, welcome!`, then you can pass the `{0}` argument to the localizer like `_localizer["HelloMessage", "John"]`.
 
@@ -255,4 +255,4 @@ See the following documents to learn how to reuse the same localization texts in
 * [Localization for the MVC / Razor Pages UI](../ui/mvc-razor-pages/javascript-api/localization)
 * [Localization for the Blazor UI](../ui/blazor/localization.md)
 * [Localization for the Angular UI](../ui/angular/localization.md)
-* [Video tutorial](https://abp.io/video-courses/essentials/localization)
+* [Video tutorial](https://abp.io/video-courses/essentials/localization)