Docs: add a link to nuget.org package

Author: ForNeVeR

README.md

@@ -2,7 +2,7 @@
 
 [![CI](https://github.com/OpenSAGE/FixedMath.NET/actions/workflows/ci.yml/badge.svg)](https://github.com/OpenSAGE/FixedMath.NET/actions/workflows/ci.yml)
 [![codecov](https://codecov.io/gh/OpenSAGE/FixedMath.NET/branch/master/graph/badge.svg?token=LZO8MJT5HA)](https://codecov.io/gh/OpenSAGE/FixedMath.NET)
-![Nuget](https://img.shields.io/nuget/v/fixedmath.net)
+[![Nuget](https://img.shields.io/nuget/v/fixedmath.net)](https://www.nuget.org/packages/FixedMath.NET)
 
 ## Changes