update CHANGELOG [skip ci]

Author: maxulysse

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+### `Changed`
+
+-   [#646](https://github.com/SciLifeLab/Sarek/pull/646) - Update [`pathfindr`](https://github.com/NBISweden/pathfindr) submodule
+
 ## [2.2.0] - Skårki - 2018-09-21
 
 ### `Added`