Fixed nuget badge

Author: Joel Mitchell

README.md

@@ -1,7 +1,7 @@
 # Cofoundry.Plugins.BackgroundTasks.Hangfire
 
 [![Build status](https://ci.appveyor.com/api/projects/status/7osl8bfowax1yysi?svg=true)](https://ci.appveyor.com/project/Cofoundry/cofoundry-plugins-backgroundtasks-hangfire)
-[![NuGet](https://img.shields.io/nuget/v/Cofoundry.Plugins.SiteMap.svg)](https://www.nuget.org/packages/Cofoundry.Plugins.BackgroundTasks.Hangfire/)
+[![NuGet](https://img.shields.io/nuget/v/Cofoundry.Plugins.BackgroundTasks.Hangfire.svg)](https://www.nuget.org/packages/Cofoundry.Plugins.BackgroundTasks.Hangfire/)
 [![Gitter](https://img.shields.io/gitter/room/cofoundry-cms/cofoundry.svg)](https://gitter.im/cofoundry-cms/cofoundry)