Added link to VaultSharp in readme

Author: MrZoidberg

README.md

@@ -2,7 +2,7 @@
 
 [![GitHub Actions Status](https://github.com/MrZoidberg/VaultSharp.Extensions.Configuration/workflows/Build/badge.svg?branch=master)](https://github.com/MrZoidberg/VaultSharp.Extensions.Configuration/actions) ![Nuget](https://img.shields.io/nuget/v/VaultSharp.Extensions.Configuration)
 
-VaultSharp.Extensions.Configuration is an extension to VaultSharp that allows reading configuration options from Vault.
+VaultSharp.Extensions.Configuration is an extension to [VaultSharp](https://github.com/rajanadar/VaultSharp) that allows reading configuration options from Vault.
 
 ## Get Started