updated changelog

Author: tillpiepenbrock

CHANGELOG.md

@@ -6,13 +6,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 ### Updated
+- possibility to assign fixed magnetic loss angle and conductivity in update_core function 
 - new isolation scheme (looking from core to all windings): core_cond_isolation=[top, bottom, inner, outer] instead of core_cond_isolation=[prim2core, sec2core]
 - gmsh 4.9.5 as minimum requirement
 
 ### Added
+- example for foil winding inductor
 - conductor material can be chosen from a small material database, used in update_conductors(), e.g. conductivity_sigma=["copper"]
 - isolations for thermal simulation
 
+
 ### Fixed
 - fix #15: Secondary to Core isolation thickness not working