update CHANGELOG

Author: maxulysse

CHANGELOG.md

@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 -   [#646](https://github.com/SciLifeLab/Sarek/pull/646) - Update [`pathfindr`](https://github.com/NBISweden/pathfindr) submodule
 
+### `Fixed`
+
+-   [#657](https://github.com/SciLifeLab/Sarek/pull/657) - Fix `RunMultiQC.nf` bug
+
 ## [2.2.0] - Skårki - 2018-09-21
 
 ### `Added`