Update CHANGELOG.md

Author: NicolasColombi

CHANGELOG.md

@@ -60,7 +60,7 @@ Removed:
 
 ### Added
 
-- `climada.hazard.tc_tracks.TCTracks.subset_years` function
+- `climada.hazard.tc_tracks.TCTracks.subset_years` function [#1023](https://github.com/CLIMADA-project/climada_python/pull/1023)
 - `climada.hazard.tc_tracks.TCTracks.from_FAST` function, add Australia basin (AU) [#993](https://github.com/CLIMADA-project/climada_python/pull/993)
 - Add `osm-flex` package to CLIMADA core [#981](https://github.com/CLIMADA-project/climada_python/pull/981)
 - `doc.tutorial.climada_entity_Exposures_osm.ipynb` tutorial explaining how to use `osm-flex`with CLIMADA