Fixed list formatting (#6079)

Author: pkulikov

docs/core/migration/20-21.md

@@ -17,7 +17,7 @@ For an overview of the new features in .NET Core 2.1, see [What's new in .NET Co
 
 * Change the [target framework](../../standard/frameworks.md) value from `netcoreapp2.0` to `netcoreapp2.1`. The target framework is defined by the `<TargetFramework>` or `<TargetFrameworks>` element.
 
-For example, change `<TargetFramework>netcoreapp2.0</TargetFramework>` to `<TargetFramework>netcoreapp2.1</TargetFramework>`.
+  For example, change `<TargetFramework>netcoreapp2.0</TargetFramework>` to `<TargetFramework>netcoreapp2.1</TargetFramework>`.
 
 * Remove `<DotNetCliToolReference>` references for tools that are bundled in the .NET Core 2.1 SDK (v 2.1.300 or later). These references include: