Update CHANGELOG.md

Author: ValentinGebhart

CHANGELOG.md

@@ -11,7 +11,8 @@ Code freeze date: YYYY-MM-DD
 ### Dependency Changes
 
 ### Added
-
+- `climada.util.interpolation` module for inter- and extrapolation util functions used in local exceedance intensity and return period functions [#930](https://github.com/CLIMADA-project/climada_python/pull/930)
+  
 ### Changed
 
 - In `climada.util.plot.geo_im_from_array`, NaNs are plotted in gray while cells with no centroid are not plotted [#929](https://github.com/CLIMADA-project/climada_python/pull/929)