requirements: apparently the need for fiona has ended with eccodes>=2.28

requirements/env_climada.yml

@@ -8,7 +8,8 @@ dependencies:
   - cfgrib>=0.9.9,<0.9.10  # 0.9.10 cannot read the icon_grib files from https://opendata.dwd.de
   - contextily>=1.6
   - dask>=2024.5
-  - eccodes>=2.27  # 2.28 changed some labels, in particular: gust -> i10fg (i20fg?)
+  - eccodes>=2.27  # 2.28 changed some labels, in particular: gust -> i10fg (i20fg?) 
+  - fiona>=1.9
   - gdal>=3.6
   - geopandas>=0.14
   - h5py>=3.8