Fixed 404 for Source Link specification link (#592)

README.md

@@ -2,7 +2,7 @@
 
 Source Link is a language- and source-control agnostic system for providing first-class source debugging experiences for binaries. The goal of the project is to enable anyone building [NuGet libraries to provide source debugging](https://github.com/dotnet/designs/blob/master/accepted/diagnostics/debugging-with-symbols-and-sources.md) for their users with almost no effort. Microsoft libraries, such as .NET Core and Roslyn have enabled Source Link. Source Link is supported by Microsoft.
 
-Source Link is a [set of packages](https://www.nuget.org/packages?q=Microsoft.SourceLink) and a [specification](https://github.com/dotnet/designs/blob/master/accepted/diagnostics/source-link.md#source-link-file-specification) for describing source control metadata that can be embedded in symbols, binaries and packages.
+Source Link is a [set of packages](https://www.nuget.org/packages?q=Microsoft.SourceLink) and a [specification](https://github.com/dotnet/designs/blob/master/accepted/2020/diagnostics/source-link.md#source-link-file-specification) for describing source control metadata that can be embedded in symbols, binaries and packages.
 
 Visual Studio 15.3+ supports reading Source Link information from symbols while debugging. It downloads and displays the appropriate commit-specific source for users, such as from [raw.githubusercontent](https://raw.githubusercontent.com/dotnet/roslyn/681cbc414542ffb9fb13ded613d26a88ea73a44b/src/VisualStudio/Core/Def/Implementation/ProjectSystem/AbstractProject.cs), enabling breakpoints and all other sources debugging experience on arbitrary NuGet dependencies. Visual Studio 15.7+ supports downloading source files from private GitHub and Azure DevOps (former VSTS) repositories that require authentication.