Bump cryptography from 3.4.5 to 3.4.6
Bump cryptography from 3.4.5 to 3.4.6

Bumps [cryptography](https://github.com/pyca/cryptography) from 3.4.5 to 3.4.6.
- [Release notes](https://github.com/pyca/cryptography/releases)
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pyca/cryptography/compare/3.4.5...3.4.6)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
mozilla-services/kinto-dist,mozilla-services/kinto-dist