DOC: Recommend conda from miniforge for contributing environment
Originally, mamba was suggested as a conda alternative because the mamba solver was faster than the old conda solver when creating environments. Now that conda uses `libmamba` as the default solver, I think we can recommend using `conda` again for development environments
Does conda use conda-forge as the default channel now? > Does conda use conda-forge as the default channel now?

When installing `miniforge` (which is recommended in our docs), `conda-forge` will be the default channel