pin rtree to 1.3 (1.4 fails pip check)

Author: emanuel-schmid

requirements/env_climada.yml

@@ -30,6 +30,7 @@ dependencies:
   - pyxlsb>=1.0
   - rasterio>=1.4
   - requests>=2.32
+  - rtree>=1.3,<1.4  # 1.4.0 doesn't pass the `pip check`
   - salib>=1.5
   - seaborn>=0.13
   - scikit-learn>=1.6