Bump cryptography from 46.0.3 to 46.0.4 in /spiffe (#378)

Bumps [cryptography](https://github.com/pyca/cryptography) from 46.0.3 to 46.0.4.
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@46.0.3...46.0.4)

---
updated-dependencies:
- dependency-name: cryptography
  dependency-version: 46.0.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]