dependencies: downgrade pandas to 1.5

Author: emanuel-schmid

requirements/env_climada.yml

@@ -16,6 +16,7 @@ dependencies:
   - netcdf4>=1.5
   - numba>=0.51,!=0.55.0  # 0.55.0 has a bug breaking coverage reports
   - openpyxl>=3.0
+  - pandas>=1.5,<2.0
   - pandas-datareader>=0.9
   - pathos>=0.2
   - pint>=0.15