Update README.md

Author: niemyjski

README.md

@@ -1,5 +1,5 @@
 # Exceptionless .NET Clients
-[![Build status](https://ci.appveyor.com/api/projects/status/xk17pk0u7a5r7yrw?svg=true)](https://ci.appveyor.com/project/Exceptionless/exceptionless-net) 
+[![Build status](https://ci.appveyor.com/api/projects/status/xk17pk0u7a5r7yrw/branch/master?svg=true)](https://ci.appveyor.com/project/Exceptionless/exceptionless-net) 
 [![NuGet Version](http://img.shields.io/nuget/v/Exceptionless.Portable.svg?style=flat)](https://www.nuget.org/packages/Exceptionless.Portable/) [![NuGet Downloads](http://img.shields.io/nuget/dt/Exceptionless.Portable.svg?style=flat)](https://www.nuget.org/packages/Exceptionless.Portable/) 
 [![Gitter](https://badges.gitter.im/Join Chat.svg)](https://gitter.im/exceptionless/Discuss)
 [![Donate](https://img.shields.io/badge/donorbox-donate-blue.svg)](https://donorbox.org/exceptionless)