jenkins install_env.sh : freeze python to 3.11 (necessary after including python in env file)

Author: emanuel-schmid

script/jenkins/install_env.sh

@@ -2,7 +2,7 @@
 
 mamba env remove -n climada_env -y
 mamba create -n climada_env python=3.11 -y
-mamba env update -n climada_env -f requirements/env_climada.yml
+mamba install -n climada_env -f requirements/env_climada.yml python=3.11 -y
 
 source activate climada_env
 python -m pip install -e "./[dev]"