Fixes documentation link

Author: LordHepipud

doc/03-Icinga-Integration.md

@@ -3,4 +3,4 @@
 Once you followed the [Installation Guide](02-Installation.md) you are ready to start the integration into Icinga 2. This will allow you to configure your Check-Commands and start using them inside service templates and services.
 
 For this you will require to have the [Icinga PowerShell Framework](https://github.com/Icinga/icinga-powershell-framework) installed on your system.
-Once done, follow the [Icinga Integration](https://github.com/Icinga/icinga-powershell-framework/blob/master/doc/05-IcingaIntegration.md) documentation there.
+Once done, follow the [Icinga Integration](https://github.com/Icinga/icinga-powershell-framework/blob/master/doc/05-Icinga-Integration.md) documentation there.