Merge pull request #293: Update link to .NET documentation

Author: derrickstolee

README.md

@@ -6,7 +6,7 @@ master|[![Build Status](https://mseng.visualstudio.com/AzureDevOps/_apis/build/s
 
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-[Git Credential Manager Core](https://github.com/microsoft/Git-Credential-Manager-Core) (GCM Core) is a secure Git credential helper built on [.NET Core](https://microsoft.com/dotnet) that runs on Windows and macOS. Linux support is in an early preview.
+[Git Credential Manager Core](https://github.com/microsoft/Git-Credential-Manager-Core) (GCM Core) is a secure Git credential helper built on [.NET Core](https://dotnet.microsoft.com) that runs on Windows and macOS. Linux support is in an early preview.
 
 Compared to Git's [built-in credential helpers]((https://git-scm.com/book/en/v2/Git-Tools-Credential-Storage)) (Windows: wincred, macOS: osxkeychain, Linux: gnome-keyring) which provides single-factor authentication support working on any HTTP-enabled Git repository, GCM Core provides multi-factor authentication support for [Azure DevOps](https://dev.azure.com/), Azure DevOps Server (formerly Team Foundation Server), GitHub, and Bitbucket.