Update Abp-5_0.md

Author: hikalkan

docs/en/Migration-Guides/Abp-5_0.md

@@ -10,7 +10,7 @@ ABP 5.0 runs on .NET 6.0. So, please upgrade your solution to .NET 6.0 if you wa
 
 ABP 5.0 uses the Bootstrap 5 as the fundamental HTML/CSS framework. We've migrated all the UI themes, tag helpers, UI components and the pages of the pre-built application modules. You may need to update your own pages by following the [Bootstrap's migration guide](https://getbootstrap.com/docs/5.0/migration/).
 
-The startup template changes
+## Startup Template Changes
 
 The startup template has changed. You don't need to apply all the changes, but it is strongly suggested to follow [this guide](Upgrading-Startup-Template.md) and make the necessary changes for your solution.