pex 2.12.1

[github-actions[bot]]

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2.12.1

This release refreshes the root CA cert bundle used by
--pip-version vendored (which is the default Pip Pex uses for
Python <3.12) from certifi 2019.9.11's cacert.pem to
certifi 2024.7.4's
cacert.pem. This refresh addresses at least CVE-2023-37920 and was spearheaded by
a contribution from Nash Kaminski in
pex-tool/pip#12. Thank you, Nash!

• Update vendored Pip's CA cert bundle. (Update vendored Pip's CA cert bundle. #2476)

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This discussion was created from the release pex 2.12.1.