Update cryptography requirement from >=2.6,<41.0 to >=2.6,<42.0 (#937)

Update cryptography requirement from >=2.6,<41.0 to >=2.6,<42.0 (#937)

Updates the requirements on [cryptography](https://github.com/pyca/cryptography) to permit the latest version.
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pyca/cryptography/compare/2.6...41.0.0)

---
updated-dependencies:
- dependency-name: cryptography
  dependency-type: direct:production
...

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