Updates changelog

Author: LordHepipud

doc/100-General/10-Changelog.md

@@ -18,6 +18,7 @@ Released closed milestones can be found on [GitHub](https://github.com/Icinga/ic
 ### Enhancements
 
 * [#679](https://github.com/Icinga/icinga-powershell-framework/pull/679) Adds a new data provider for fetching process information of Windows systems, while sorting all objects based on a process name and their process id
+* [#669](https://github.com/Icinga/icinga-powershell-framework/pull/669) Adds new metric to the CPU provider, allowing for distinguishing between the average total load as well as the sum of it
 
 ## 1.11.2 (tbd)