.NET Core, mention in multitargeting section

Author: ghogen

docs/msbuild/msbuild.md

@@ -173,7 +173,7 @@ The command line `dotnet build --help` lists the command-line options specific t
 
 ## <a name="BKMK_Multitargeting"></a> Multitargeting
 
- By using Visual Studio, you can compile an application to run on any one of several versions of .NET Framework. For example, you can compile an application to run on .NET Framework 2.0 on a 32-bit platform, and you can compile the same application to run on .NET Framework 4.5 on a 64-bit platform. The ability to compile to more than one framework is named multitargeting.
+ By using Visual Studio, you can compile an application to run on any one of several versions of .NET Framework or .NET Core, including .NET 5 and later. For example, you can compile an application to run on .NET Framework 4 on a 32-bit platform, and you can compile the same application to run on .NET Framework 4.8 on a 64-bit platform. The ability to compile to more than one framework is named multitargeting.
 
  These are some of the benefits of multitargeting: