pin geopandas down to 0.x for the time being

requirements/env_climada.yml

@@ -11,7 +11,7 @@ dependencies:
   - eccodes>=2.27  # 2.28 changed some labels, in particular: gust -> i10fg (i20fg?) 
   - fiona>=1.9
   - gdal>=3.6
-  - geopandas>=0.14
+  - geopandas>=0.14,<1.0
   - h5py>=3.8
   - haversine>=2.8
   - matplotlib-base>=3.9