security/py-openssl: restore previous version

py-openssl new version rely on a minimum version of
security/py-cryptography which is not yet available in the tree. This
cause problems on consumers that fails at runtime due to unsatisfied
pkg_resources requirement

pkg_resources.ContextualVersionConflict: (cryptography 3.3.2 (/usr/local/lib/python3.10/site-packages), Requirement.parse('cryptography>=35.0'), {'PyOpenSSL'})

Reported by: yasu