Bump cryptography from 38.0.4 to 39.0.1 in /python/sklearnserver (kub…

…eflow#2803)

Bumps [cryptography](https://github.com/pyca/cryptography) from 38.0.4 to 39.0.1.
- [Release notes](https://github.com/pyca/cryptography/releases)
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@38.0.4...39.0.1)

---
updated-dependencies:
- dependency-name: cryptography
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>