doc: update CHANGELOG

CHANGELOG

- 
+## 2025.04.15
+
+Features:
+
+  - adds chunking flexibility, allows to choose chunksize (`--size`) and whether you 
+    want to leave all dimensions to `auto` for Dask (`--auto-chunks`).
+  - adds option to force horizontal chunking (`--force-horizontal`).
+  - adds option to check the chunk size of the input dataset (`--check-chunk-size`).
+
 ## 2022.03.08 
 
 Added plugin template repository