chore(readme): badge trying to fix appveyor

Author: jrgcubano

README.md

@@ -1,6 +1,6 @@
 ![FluentNHibernate logo](https://raw.githubusercontent.com/jagregory/fluent-nhibernate/master/docs/logo.png)
 
-[![Build status](https://ci.appveyor.com/api/projects/status/2uin9xw5yxxfhc93/branch/master?svg=true)](https://ci.appveyor.com/project/jrogalan/fluent-nhibernate/branch/master)
+[![Build status](https://ci.appveyor.com/api/projects/status/4l7pq2uqrqqasola/branch/master?svg=true)](https://ci.appveyor.com/project/jrogalan/fluent-nhibernate/branch/master)
 [![NuGet](https://img.shields.io/nuget/v/FluentNHibernate.svg)](https://www.nuget.org/packages/FluentNHibernate)
 
 Fluent, XML-less, compile safe, automated, convention-based mappings for NHibernate. *Get your fluent on.*