Merge pull request #2616 from fffej/patch-1

Update a link due to a 404.

Author: stephentoub

Documentation/project-docs/support-dotnet-core-instructions.md

@@ -4,7 +4,7 @@ Want to make your libraries multi-platform? Want to see how much work is require
 
 ## New Targets
 
-- [.NET Core 5](https://www.dotnetfoundation.org/netcore5): Has a modular design, employs side-by-side, and targets cross-platform scenarios. Side-by-side allows you to adopt new .NET Core versions without breaking other apps.
+- [.NET Core 5](https://www.dotnetfoundation.org/netcore): Has a modular design, employs side-by-side, and targets cross-platform scenarios. Side-by-side allows you to adopt new .NET Core versions without breaking other apps.
 - [ASP.NET 5](https://www.dotnetfoundation.org/aspnet-5): is a modern web-framework built on .NET Core 5 thus giving developers the same benefits.
 - [.NET Native](http://blogs.msdn.com/b/dotnet/archive/2014/04/24/dotnetnative-performance.aspx): Improve performance of your Windows Store apps that run on x64 and ARM machines by using .NET Native's static compilation.