Update README.md

Author: sswedan

README.md

@@ -8,7 +8,7 @@ TuesPechkin is a .NET Wrapper for the [wkhtmltopdf](https://github.com/wkhtmltop
 - [Azure Websites does not currently support the use of wkhtmltopdf.](http://social.msdn.microsoft.com/Forums/windowsazure/en-US/eb48e701-8c0b-4be3-b694-2e11cc6ff2e1/wkhtmltopdf-in-windows-azure?forum=windowsazurewebsitespreview)
 - It is not tested with any operating systems besides Windows.
 - [It is available as a *NuGet package* for your convenience.](https://www.nuget.org/packages/TuesPechkin.Wkhtmltox.AnyCPU/)
-- It is built and tested around wkhtmltopdf 0.12.4.
+- It is built and tested around wkhtmltopdf 0.12.6.
 - Even if you use the IIS-compatible method documented below, you may only use one converter/toolset instance per application pool/process. A workaround is being researched for a future version.
 
 ### wkhtmltox.dll