use a version of requests that supports the version of chardset it installs

[kennyworkman]

gets rid of annoying warning on any subcommand that makes a request:

/root/miniconda/envs/jupyterlab/lib/python3.9/site-packages/requests/__init__.py:104: RequestsDependencyWarning: urllib3 (1.26.9) or chardet (5.1.0)/charset_normalizer (2.0.12) doesn't match a supported version!
  warnings.warn("urllib3 ({}) or chardet ({})/charset_normalizer ({}) doesn't match a supported "

• https://github.com/psf/requests/releases/tag/v2.28.1
• support chardet v5.0.0 psf/requests#6177