Write blog post about how to delete conda environments

[haesleinhuepf]

... in case

conda env remove --name my_env

doesn't work.

On Windows you go to C:/users/Robert/mambaforge/envs and rename the env to something like my_env_2023-01-29, because you're not allowed to delete the folder. Later, after restarting the computer, one can delete the folder.

If anyone has a better idea how to solve this, it's welcome!