website: Segregate C/C++ and Python coding styles

We now recommend using Black for automated styling of Python files. This
commit adds this recommendation and labels the older style guide as
being for C/C++ exclusively.

Change-Id: Id42cd3b512288da334164e4491ce49f6db40f404
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/62113
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
1 file changed