conda environment: downgrade cartopy

0.18.0 -> 0.17.0

(cherry picked from commit f85f006)

Author: emanuel-schmid

requirements/env_climada.yml

@@ -3,7 +3,7 @@ channels:
   - defaults
 dependencies:
   - bottleneck=1.3.2
-  - cartopy=0.18.0
+  - cartopy=0.17.0
   - conda-forge::cfgrib=0.9.7.7
   - cython=0.29.21
   - dask=2.25.0