Update readme.md and set_up_env.sh

setup_env.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # Define the name of the environment
-ENV_NAME="pyenv5505"
+ENV_NAME="multiphase_chemistry_env"
 
 # Check if mamba is available and use it instead of conda for faster installation
 if command -v mamba &> /dev/null; then