388 pinned to Python 3.11 for building the mambaforge images here, to prevent issues in the situation where some but not all RAPIDS repos had added Python 3.12 support.
This proposes moving that pin to Python 3.12.
Keeping this hard-coded will prevent similar issues the next time we go to add a Python version (Python 3.13) across RAPIDS.
Contributes to https://github.com/rapidsai/build-planning/issues/40
388 pinned to Python 3.11 for building the mambaforge images here, to prevent issues in the situation where some but not all RAPIDS repos had added Python 3.12 support.
This proposes moving that pin to Python 3.12.
Keeping this hard-coded will prevent similar issues the next time we go to add a Python version (Python 3.13) across RAPIDS.